Knights of Grumthorr is a game I have written in C# and using the SDL2 library for graphics and sound.
It is a medieval fantasy 2d rts type game.
There is a main campaign, a series of custom scripted maps, skirmish mode and an editor which provides full access to the scripting system.
The game is moddable with users able to modify, add, change and extend the game graphics, audio and scripting system themselves very easily.
I have enjoyed creating it and am hoping to sell a few copies on Steam over time.