2D platformers: a game programmer’s guide High-Order Fun has a helpful guide to programming 2D platformers that walks through how to calculate basic movement, slopes, ladders, stairs, one-way ...

Superpowers is a good program for developing or creating 2D & 3D games for Windows, Linux, Android, iOS. Not for novices & needs some getting used to.

3dSen brings your favorite NES classics to life by transforming 2D retro games into immersive 3D worlds, now available on Steam ...