A refreshingly simple data-driven game engine built in Rust
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A game framework written with osu! in mind.
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Retro game engine for creating games like it's 1997
An isometric arcade-style game of skill, puzzles and exploration
Game framework with AI
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SDL based generic 2D game engine
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IGS Labs
Mahasona engine is an open source game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Java Client + JS/Canvas Server-Side System, with maintained Objects