Screenshots
Watch trailer on Steam ↗Grid Forge TD
Yarrichar Studios · Published by Yarrichar Studios
Last updated 28 Sept 2026
Stop continuous waves of enemies by building a maze in this free flowing tower defense game. Purchase upgrades between runs to become even more powerful and go further next time.
Indie, Simulation, Strategy · More free games
Navigate through waves of foes by crafting and refining your defensive maze in Grid Forge TD. Each run offers new upgrades to enhance your fortress for future challenges.
About this game
Grid Forge TD is an incremental tower defense game.
Tower defense
Enemies start at one side. Your job is to stop them reaching the other side. You can place walls, towers, and buy upgrades to achieve this.
Maze building
You place tetronimoes to block the enemy and build up the path that they must follow. You have limited space to work with (at least at the beginning...) so smart placement matters.
Tiles can be stacked which provide bonuses to the towers on top of them. This leads to the question - do you make the path longer with this piece you've been waiting for or do you build up your walls for bigger bonuses?
Meta progression
With each run you earn research points to buy upgrades. These can be everything from making towers do more damage, to generating tetronimoes faster, to increasing the amount of gold you start with
Prestige
Once you defeat wave 12 you unlock the next prestige level. You'll face tougher enemies, but you'll also earn more resources and be able to buy new upgrades like ice and lightning towers.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10
- Processor: Intel® Core™ i5-9600
- Memory: 4 GB RAM
- Graphics: Nvidia GeForce GTX970
- Storage: 1 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
Latest news
Patch NotesOfficial
Version 0.43
Version 0.43 is out, and includes a range of fixes and features:Enemy rendering / performance fix - one draw call for all, instead of one draw call eachEnemy selection / performance fix - speed up for when towers are selecting an enemy to shoot atUpgrade screen UI updateMain menu UI update, including an animation on the RHSEnemies get a speed boost if more than 5 waves are activeEnemies will wait longer before reroutingReduce the number of times a wall has be broken before the tile it's on cracksBugfix: Game froze if clicking the settings menu while editing a towerBugfix: Clicking a gem in the hotbar for a second time should deselects itBugfix: Tabs fixes - it now selects the next tetromino correctly, and doesn't cancel fast forwardingI've also updated the screenshots and trailer.Read full article on Community Announcements (yarrichar)Patch NotesOfficial
Version 0.42
Version 0.42 is a small update:* Fixed a bug where the tetromino stacking bonus wasn't being applied to cannons* If the path changes enemies wait a couple of tiles before re-routing* Added a new upgrade that allows you to queue up tetrominoes. Sorry for the second update in a few days, I'll try and keep them a bit further apart / less spammy!Read full article on Community Announcements (yarrichar)Patch NotesOfficial
Version 0.41 released
I've just released Version 0.41. Main changes are:UI updateOnboarding improvement / simplificationEnemy targeting improvements - you can now apply selected targeting to all towers, or all towers of the same typeSniper: 10% extra damage each time a given sniper tower hits the same enemyCracked tiles: if you delete tiles on the same grid location 4 times or more you will no longer be able to build on top of them. Starting the next wave early now doesn't cost you time. E.g. if you start the wave 5 seconds early your mana bar will refill as if those 5 seconds had occurred rather than been skipped.Right click now rotates your tetrominoesOption to remove damage numbers (should help performance at excessively high wave numbers!)Option to disable the slow-down while placing a tetrominoRead full article on Community Announcements (yarrichar)
