So, right now Unity, Cryengine and Godot all use C# as a language (though it's fairly new to Godot, but is fully supported). Godot is a free game engine to get

So, right now Unity, Cryengine and Godot all use C# as a language (though it's fairly new to Godot, but is fully supported). Godot is a free game engine to get started on and publish on to start with side projects/build up a portfolio on - though (and double check the documentation) you can use Unity for free and then they take a cut if your game makes more than X amount I THINK.