Red Runner, Awesome Platformer Game.
DDraceNetwork, a free cooperative platformer game
A Mega Man Engine for anyone to develop their games with in Unity.
A open source 2D platformer being made in Godot 4 beta C#
Simple 2D Game For Mobile Devices
Top-down shoot'em up with gravity gun and physics puzzles
[Unity Tiny] Spherestroyer- feedback is welcome