Ebitengine
Simple 2D game engine for Go — the de-facto standard for 2D game development in Go. Ebitengine (formerly Ebiten) provides a simple, immediate-mode graphics API: implement the Game interface with Update() and Draw() methods, and Ebitengine handles the game loop, input, audio, and rendering. Targets Windows, macOS, Linux, iOS, Android, and WebAssembly (browser) from a single codebase. Uses OpenGL/Metal/DirectX/WebGL for rendering. Known for its simplicity and retro-game aesthetic (pixel art, chiptune). Used by the Go community for game jams and indie games.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Game engine — no network exposure from engine itself. WASM builds run in browser sandbox. Online features are application responsibility. No credentials needed for local development.
⚡ Reliability
Best When
You're a Go developer building 2D games, game jams, or graphical simulations and want a simple, code-first engine with cross-platform compilation including WebAssembly.
Avoid When
You need 3D graphics, a visual editor, complex physics, or AAA game features. Ebitengine is intentionally simple — its strength is its constraint.
Use Cases
- • Build 2D game visualizations for agent simulations — game-loop architecture makes Ebitengine natural for visualizing agent environments, pathfinding, or reinforcement learning in Go
- • Create interactive data visualizations and dashboards using Ebitengine's immediate-mode rendering — pixel-level control for custom agent monitoring displays
- • Develop cross-platform Go tools with graphical display requirements — visualize agent decision trees, network graphs, or state machines with Ebitengine's canvas API
- • Build browser-based Go applications compiled to WebAssembly using Ebitengine's WASM target — agent demo tools that run in browser without server
- • Prototype 2D game concepts in Go for game jam development — Ebitengine's simplicity enables rapid 2D game prototyping with the full Go ecosystem available
Not For
- • 3D game development — Ebitengine is 2D only; use Godot (GDScript/C#), Unity (C#), or go3d for 3D games
- • Production-grade game engines requiring visual editors — Ebitengine has no visual editor, prefab system, or asset pipeline; it's code-only; use Godot for editor-based game development
- • High-performance AAA game development — Ebitengine is for 2D indie games and simple visualizations; not optimized for complex physics, large-world rendering, or AAA visual effects
Interface
Authentication
Game engine — no auth concepts. Online features (leaderboards, etc.) handled by application code.
Pricing
Ebitengine is Apache 2.0 licensed, maintained by Hajime Hoshi. Free for all use including commercial games.
Agent Metadata
Known Gotchas
- ⚠ Game loop runs at 60 TPS by default — Update() called 60 times/second independent of Draw(); physics and game logic in Update(); rendering-only code in Draw(); mixing logic in Draw() causes incorrect simulation speed
- ⚠ Image sizes must be power-of-2 for some operations — Ebitengine's GPU textures work with any size but filtering and subimage operations perform best with power-of-2 dimensions; atlas textures recommended for sprites
- ⚠ Mobile builds require gomobile — `GOOS=android go build` doesn't work; use gomobile bind for Android AAR and gomobile build for iOS; gomobile setup is separate from standard Go toolchain
- ⚠ WASM builds need wasm_exec.js — browser deployment requires Go's wasm_exec.js (version must match Go compiler version) in HTML; stale wasm_exec.js from older Go causes silent runtime failures
- ⚠ Ebitengine's Draw() is immediate-mode — no retained scene graph; every frame redraws everything to screen.DrawImage(); stateful rendering requires storing image state in game struct and redrawing each frame
- ⚠ Audio latency on browsers — Web Audio API introduces latency compared to desktop audio; audio cues may feel delayed in browser builds; tune audio timing for WASM target separately from desktop
Alternatives
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Scores are editorial opinions as of 2026-03-07.