1.MonoGame / MonoGameOne framework for creating powerful cross-platform games.xnamonogamegame-frameworkgamedevcsharpcross-platform+7 moreC#Other license15K total3.1K forks+130 starsfrom 14,472 · score 4.88
2.FNA-XNA / FNAFNA - Accuracy-focused XNA4 reimplementation for open platformsxnafnacsharpgamedevwindowsmacos+2 moreC#No license3.1K total337 forks+18 starsfrom 3,048 · score 2.94
3.ppy / osu-frameworkA game framework written with osu! in mind.game-frameworksgame-engineosuhacktoberfestC#MIT2K total511 forks+16 starsfrom 2,015 · score 2.83
4.prime31 / NezNez is a free 2D focused framework that works with MonoGame and FNAmonogamefnanezfarseerphysicsC#MIT2.1K total374 forks+11 starsfrom 2,079 · score 2.48
5.sschmid / EntitasEntitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unityc-sharpunityecstddperformancedesign-pattern+10 moreC#MIT7.7K total1.1K forks+9 starsfrom 7,671 · score 2.30