Linegem | Free Web-Based Strategy Arcade Game
Stack, match, break down and rebuild in this incrementally challenging web-based strategy arcade game.

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Linegem Labs
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Score
0

Lines0

Speed
1X

Vanished0

Interval
T-300

Energy
40/40
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Level 1
See CONTROLS in menu for more
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(•)
See right for numpad equivalent
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SPACE
Read me / Tutorial
This tutorial contains necessary information to get a better understanding of the game, as well as some tips to help you along the way. Don't forget to check out the CONTROLS section of the menu as well!
Introduction / The Basics
1 - The reactor is out of control. Mysterious round gems are drifting downward in various sequences, prompting you to maintain them to prevent an overflow and save the city from chaos.
2 - Some sequences are malformed and may drift apart upon landing, causing the separated gems to continue drifting downward until they land (other than when an overflow occurs).
3 - As an administrator of the reactor's software, you can control their sequences.
4 - Each sequence has an axis upon which it rotates.
5 - You can guide the sequences by rotating them, moving them left, right, or down, or placing them (causing them to land instantly).
6 - You can also regenerate drifting sequences to form new sequences. Regenerating sequences requires and consumes energy, and will cause other gems in the current drift path to vanish, more specifically, gems surrounding your guide circles (all gems up to two spaces above, to the right, below, and to the left of each guide circle).
Please note that guide circles will not be visible if one of the gems in the current drifting sequence is in the same position as where one of the guide circles would normally be visible, though vanishing still behaves in the same way as if the guide circles are visible.
7 - Over time, random gems may also vanish for no apparent reason, but in specific intervals. The higher the drift speed, the more often random gems will vanish.
"Obstacle" gems will also appear during gameplay in a slightly deterministic fashion based on level and other factors, which is explained in-depth further down, and can either help or hinder your progress based on how well gems are managed.
8 - You can convert gems into energy by lining them up in rows of 15, which is best achieved by stacking sequences timely and efficiently as the drift speed will increase for every line converted to energy until 10X speed is reached. You will start with 40/40 energy and gain 10 energy per line converted.
9 - You can use this energy to help you break down and rebuild lines by taking advantage of the fact that other gems in the current drift path will vanish upon manual sequence regeneration.
10 - You will earn an incremental score based on the total number of lines you've converted to energy and the total number of gems that have vanished (either naturally or during manual sequence regeneration). Additionally, the more lines converted in a single landing, the greater the score bonus.
Match bonus - For every line you convert to energy that contains at least 4 gems of a kind, you will gain a 4% score bonus on top of your total added score for every occurence of that same kind of gem on that line. Matches will be highlighted by rounded half-borders.
By this logic, if you have only 4 matching gems on a single line upon conversion, that adds a 16% increase to your total added score. Since you can convert multiple lines to energy at the same time, this bonus percentage will encompass all of them.
Clearance - After converting 15 lines to energy, the genesis gem at the top of the gamespace above the boundary line will become activated and have an animated border.
Tapping or clicking anywhere in the gamespace above the boundary line (or pressing the enter key) while the genesis gem has an animated border will generate a new sequence and cause ALL gems in the gamespace to vanish.
Please note that these vanished gems will not be counted toward your stats or score.
Clearance can be used to your advantage in different scenarios, including getting a fresh start at higher drift speeds.
After the genesis gem is used and loses its power, you will need to convert an additional 15 lines to energy in order to power it up and use it again. The genesis gem's current power is indicated by how many red-ish circles there are on the boundary line.
Levels - The game will progress to a higher level for every 4 lines converted to energy. Level will determine the type (color) of upcoming obstacle gems, and partially determine how many will appear.
Anomalies & Obstacles - Every 10th sequence generation, an "anomaly" (or color-changing gem that glows) will appear in a random empty location below the boundary line and above all other gems, and will be counted as and behave identically to a regular gem that has already landed, meaning you may accidentally or intentionally land on top of it. If there are any gems directly below the boundary line, an anomaly will not appear.
During the appearance of anomalies (or shortly after if lines have just been converted), obstacle gems will also appear in empty locations. The percentage of all currently landed gems that have matches, and how well-organized the gems are, will determine how conveniently obstacle gems will be placed when they appear. Obstacle gems will never complete lines. The higher the level and the more empty locations there are, the higher the number of obstacle gems that will appear.
Anomalies will naturally vanish upon the next sequence generation (leaving obstacle gems in place) or may vanish as a result of manual sequence regeneration or during the vanish interval. The vanishing of these gems will only be counted toward your stats or score if they vanish as a result of manual sequence regeneration (in the current drift path) or during the vanish interval.
Upon using clearance, anomalies will reset so that one will not appear for another 9 sequence generations.
Pro tips
1 - The incremental score you earn for the total number of lines you've converted to energy is 10 times greater than the incremental score you earn for the total number of gems that have vanished (either naturally or during manual sequence regeneration).
2 - If you use regeneration wisely to vanish more unmatched or inconvenient gems at a time and/or rebuild lines to have more matches, as well as fix lines where gems have vanished naturally, you should earn a greater overall score, though matching becomes more difficult at higher speed or level.
3 - Try not to forget about the "super-left" and "super-right" CONTROLS. It takes time to become efficient at higher speed, but the more you practice using all of the controls at your disposal, the easier it becomes.
Preventing an overflow
1 - Vanish gems too close to the boundary line whenever possible (if necessary).
2 - If you're running low on space and energy, take the opportunity to convert lines whenever possible, even if it means a lower score.
3 - If the genesis gem is activated, keep clearance in mind for when you feel like your stacks just aren't adding up. Vanishing all gems is better than an overflow or too many poorly matched lines.
Progress bars
Score - This progress bar shows how close you are to reaching the current highscore. If you're watching the last game replay or the highscore replay, it shows how close the replay is to the current highscore. However, if you're watching the "preview" replay, it shows how close the preview is to ending.
Speed - This progress bar shows how close you are to reaching the highest drift speed (10X).
Interval - This progress bar shows how close a random gem is to vanishing. This progress bar fills up faster at higher drift speeds.
Energy - This progress bar shows how close you are to reaching 40 unused energy. Once this progress bar is full, you won't be able to save any more energy until you use energy.
Replays
Every time you open the menu (pause manually), or you get an overflow (game over), or you reach the highscore, a replay will be automatically saved (if the score condition is met).
Last game replays will only be saved if you have a score greater than 0, otherwise replaying the last game will replay the most recent game in which a score greater than 0 was achieved.
Extra info for nerds
1 - All gems from malformed sequences will always finish landing before converting lines to energy (if any complete lines).
2 - Rotating a sequence while it is too close to other gems may result in the sequence being moved above those gems (if one of the gems in the rotating sequence interferes with a gem that has already landed), with very little time left to move the sequence again before it lands.
In rare cases, malformed sequences may cross through gems on rotation if they do not have gems to the left or right of them since malformed sequences have missing gems. Though this is a rare case, it is by design, and gems will never replace other gems on rotation.
3 - Manually moving a sequence downward will pause drifting for a short amount of time, allowing you to move it left or right before it continues drifting. This short pause may also be used to your advantage at higher drift speeds.
4 - Drifting will also pause temporarily after every new sequence generation, every time a sequence lands or the last gem from a malformed sequence lands, as well as every time a gem from the current drifting sequence interferes with a gem that has already landed (or any edge of the gamespace) upon rotation.
5 - The vanish interval will also pause any time drifting is temporarily paused (other than when gems above converted lines or gems from malformed sequences are still drifting), saving you some time before another random gem vanishes.
6 - The same sequence will never be generated twice in a row.
7 - There are a total of 10 different types of gems (colors) and 32 possible sequences, 10 of them being malformed versions of other sequences and 11 of them being dark (onyx) versions of non-malformed sequences.
8 - Sequence rolls are not completely random, though random enough to keep the game challenging with room for strategy building while ensuring no two playthroughs will ever be the same.
There will never be more than 15 sequences generated without a "blue bar" being generated (a line sequence of 4 sapphire gems). Additionally, if a specific gem type (color) other than dark (onyx) isn't generated within 15 sequences, that color will be placed into a queue so that a sequence of that color will be generated soon.
Since dark (onyx) sequences can be converted to any other gem type (color) upon landing, all color counters will reset upon one being generated.
9 - If you are inactive for 14 seconds, the game will pause and the menu will be displayed.
10 - The highest possible score is 99,999,999. If ever achieved, the game will continue until an overflow, though the score will not increase any further.



MENU
Mobile buttons
(Scroll for keyboard)
Left side buttons
Rotate sequence clockwise
Place / land sequence
Regenerate sequence
Move sequence down once
Right side buttons
Move sequence left once
Move sequence right once
Move sequence left twice
("super-left")
Move sequence right twice
("super-right")
Center buttons
Pause / open menu
If your display isn't wide enough, the menu button may be hidden. In this case, you may also tap or click anywhere in the gamespace below the boundary line to pause.
Mute background music
(unmuted)
Unmute background music
(muted)
Mute voice (unmuted)
Unmute voice (muted)
If your display isn't wide enough or you're watching a replay, the background music and voice toggles may be hidden. In this case, you can find the same toggle in the game menu.
(•) Clearance
While the genesis gem is activated, you may tap or click anywhere in the gamespace above the boundary line to vanish all gems (clearance).
See the READ ME section of the menu to get a better understanding of the game.
Numpad / Keyboard
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(•)
7 (or Home) -
Pause / open or close menu
8 (and 9 or Page Up) -
Rotate sequence clockwise
6 - Move sequence right once
3 (or Page Down) -
Move sequence right twice
("super-right")
2 - Move sequence down once
4 - Move sequence left once
1 (or End) -
Move sequence left twice
("super-left")
5 (and Decimal or Delete) -
Place / land sequence
0 (or Insert) - Regenerate sequence
ENTER - (•) Clearance (vanish all gems)
Extras / Keyboard
Q
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S
D
Z
X
C
SPACE
M - Toggle background music
V - Toggle voice
Q (and Escape) -
Pause / open or close menu
W (and Up Arrow) -
Rotate sequence clockwise
D (and Right Arrow) -
Move sequence right once
C - Move sequence right twice
("super-right")
X (and Down Arrow) -
Move sequence down once
A (and Left Arrow) -
Move sequence left once
Z - Move sequence left twice
("super-left")
S (and either Control key) -
Place / land sequence
SPACE - Regenerate sequence
ENTER - (•) Clearance (vanish all gems)



MENU
Dustin Slagle
Linegem Labs
© 2025—2026
Game & Concept Design
Game Development
Graphic Design / Curation
Sound Design / Curation
Control Scheme Design
Web App Design & Development
User Interface Design
User Experience Design
Official Linegem Icon & Logo
Wallpaper Design & gem reactor concept
Web App Version 0.7.6.Beta
The following companies or individuals named below are not part of Linegem Labs, and are in no way affiliated with, endorsing, or endorsed by Linegem and/or Linegem Labs.
Typodermic Fonts Inc.
Dendritic Voltage Font
2DFUNS Studio
PIXY Font (this font)
The jQuery Team
A JavaScript library
James Simpson
GoldFire Studios
howler.js - A JavaScript audio playing library
turuslan
HackTimer.js - A script that avoids browser throttling (used to help prevent replay system from malfunctioning)
Baggeb
Many neon signs depicted in the wallpaper inspired by Baggeb on Pixabay



MENU
Terms & Conditions
1. Introduction
By accessing and playing Linegem (“the Game”) or by using the website at linegem.com (“the Website”, “our Website”), operated by Linegem Labs (“the Company,” “we,” “us,” “our”), you agree to comply with and be bound by these Terms and Conditions and our Privacy Policy. If you disagree with any part of these terms, you must not play the Game or use the Website.
2. Use of the Website and the Game
You are granted a limited, non-exclusive, non-transferable license to access and play the Game for personal, non-commercial use only.
However, you are free to stream, share, and discuss the Game on platforms such as Twitch and YouTube, including monetized streams, as long as the content remains within the boundaries of the Game's intended use.
You agree not to engage in any unauthorized or unlawful activities on the Website or the Game, including tampering with the game's functionality or attempting to disrupt or gain unauthorized access to any part of the Website.
3. Cookies and localStorage
For information on how we use cookies and how you can manage them, as well as how we use localStorage, please refer to our Privacy Policy.
4. Limitations of Liability
Linegem Labs is not liable for any damages, including but not limited to data loss, errors, or interruptions, resulting from your use of the Game or the Website.
5. Links to Third-Party Sites
The Website may contain links to Linegem's official social media pages. These links are provided for convenience, and we are not responsible for the content or practices of any third-party websites.
6. Advertisements and Third-Party Content
You acknowledge and agree that any advertisements or promotional content displayed on the platform are provided by third-party advertisers and not by Linegem Labs. Linegem Labs does not endorse, control, or take responsibility for the content of any advertisements, including but not limited to the accuracy, legality, or reliability of the information presented.
Furthermore, Linegem Labs shall not be held liable for any consequences arising from interactions with advertisements, including, without limitation, any actions taken by you upon clicking on an advertisement, or any content, goods, services, or websites to which such advertisements may direct you. Any engagement with third-party advertisements is at your own risk.
7. Changes to the Terms
We may update or modify these Terms and Conditions at any time. All changes will be effective upon posting on this page. Your continued use of the Website or the Game after such changes constitutes your acceptance of the updated Terms.
8. Governing Law
These Terms and Conditions are governed by the laws of New York, without regard to its conflict of law principles.



MENU
Privacy Policy
1. Introduction
Linegem Labs (“the Company,” “we,” “us,” “our”) is committed to protecting your privacy. This Privacy Policy includes information on how we use cookies and localStorage on the website linegem.com (“the Website”, “our Website”) and during your gameplay of Linegem (“the Game”).
2. Cookies and localStorage
The Website uses localStorage to:
A. Save your highscore and game replays. The game controls or buttons you press or use are saved as a string of numbers in order to be replayed. We do not monitor highscores or replays, and we do not save this information on our servers, nor does this information get sent to our servers.
B. Remember your settings such as background music or voice toggles so they are correctly toggled on or off when you re-enter the Website or Game.
C. Remember your cookie consent preferences so that the consent banner is not shown repeatedly if you choose to "Accept All".
By using the Website and choosing to "Accept All", you consent to the use of these cookies, as well as localStorage.
You can choose to "Reject All", or you can manage or disable cookies through your browser settings, though either of these options to prevent cookies may limit some functionality on the Website.
Upon clicking "Reject All", the website will also refrain from using localStorage. This can be changed at any time by changing your cookie preferences on the Website.
3. Your Cookie Preferences
You can change your cookie preferences at any time by tapping or clicking the "Cookies" link in the footer of the Website or Game Menu.
4. Collection of Personal Data
At Linegem Labs, we collect website traffic data every time a user visits a page or specific files on our Website, linegem.com. This data includes IP addresses, browser and device information, timestamps, and information to help identify the specific pages, or in some cases, files visited.
The purpose of collecting this information is to conduct overall statistical analysis, monitor and mitigate suspicious activities such as Distributed Denial of Service attacks, and improve the security and performance of our Website.
Additionally, our hosting provider may also collect similar data in order to provide us with usage analytics and to monitor for and mitigate illegal or malicious activity.
Data that is saved or stored in localStorage by linegem.com (outlined in the "Cookies and localStorage" section of this Privacy Policy) is only stored on the user's device, and does not include sensitive or personally identifiable information.
5. Third-Party Links
The Website may contain links to third-party websites or social media pages. These third-party sites have their own privacy policies, which we recommend you review. We are not responsible for the privacy practices of these external sites.
6. Changes to the Privacy Policy
We may update this Privacy Policy from time to time. Any changes will be posted on this page, and the revised policy will be effective immediately upon posting.
7. Contact Us
If you have any questions or concerns about this Privacy Policy, please contact us at: linegemlabs@gmail.com.



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