So long as your 2D game doesn't have lighting or require shaders. You'd limit yourself to vector rasterizing and blitting bitmaps. There are loads of 2D games

So long as your 2D game doesn't have lighting or require shaders. You'd limit yourself to vector rasterizing and blitting bitmaps. There are loads of 2D games out there pushing the GPU far enough that they would never run in software rendering.