Side-by-side comparison of two listed Games — real listing data only, no paid placement.
On record, they differ in: pricing (ct.js Free vs GameMaker Freemium); platforms (ct.js 1 official install link found vs GameMaker 2 — store/installer links only); unique tags (ct.js 2: #javascript #open-source vs GameMaker 2: #no-code #beginner); category rank (ct.js #23 vs GameMaker #30). Same category (Games). Listing facts only — not a recommendation.
Free 2D game engine based on web technologies with visual tools
ct.js is a free 2D game engine built on web technologies that aims to make learning programming fun and game development easy. It combines visual tools, documentation and a flexible modular library, with several coding language options and localized versions.
Published 2026-08-13 · Links checked 2026-09-06
Free 2D game engine for beginners and professional indie developers
GameMaker is a free 2D game engine aimed at both beginners and professionals. It provides tools, tutorials and asset bundles for building indie games with no prior experience required, and is also used to teach game design.
Published 2026-08-13 · Links checked 2026-09-06
| ct.js | GameMaker | |
|---|---|---|
| Pricing | Free | Freemium |
| Category | Games | Games |
| Rank in Games | Position #23 of 74 | Position #30 of 74 |
| Alternatives listed | 12 → | 12 → |
| Shared tags | #game-engine #2d | |
| Unique tags | #javascript #open-source | #no-code #beginner |
| Platforms | Windows | macOS · Windows |
| Source code | github.com/ct-js/ct-js | Not detected on official site (checked 2026-09-20) |
| Documentation | docs.ctjs.rocks/ | Not detected on official site (checked 2026-09-20) |
| Company | Not detected on official site (checked 2026-09-20) | YoYo Games |
| Founded | Not detected on official site (checked 2026-09-20) | 2004 |
| In their own words | — | Make a game with GameMaker, the best free video game engine. Perfect for beginners and professionals. Learn to build your own 2D indie games with our simple…— official site (homepage description), checked |
| Official channels | X (Twitter)declared on ctjs.rocks via homepage link with a matching handle | X (Twitter)YouTubeFacebookdeclared on gamemaker.io via schema.org sameAs |
| Official website | ctjs.rocks | gamemaker.io |
| Site preview | ||
Rank = neutral rotation by listing ID, not a quality score · how it works
Only platforms with an official store or installer link are listed; others may exist.
ct.js is Free; GameMaker is Freemium. Both are listed in Games on ToolDock.
What they have in common: #game-engine · #2d
ct.js is listed as free; GameMaker is listed as freemium (free tier alongside paid plans). Pricing label set at listing time; official pricing page linked where verified — see each official website for current details.
Both are Games listed on ToolDock, and they share the tags game-engine, 2d.
ToolDock keeps a tag-matched alternatives list for each: see ct.js alternatives and GameMaker alternatives.