Cross-platform 2D game engine focused on ultimate productivity
Stride (formerly Xenko), a free and open-source cross-platform C# game
A game framework written with osu! in mind.
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
Ze Text Adventure game Builder : Create as you play !
Tools and Z80 engine for creating adventure games. (RUST)
2D Game Engine