Torque 2D

Torque is a powerful game engine for 2D game development with which you'll be able to create anything from platforms, to card games, to just about any other game your own creativity can come up with.

Of course, creating a video game isn’t something you can do in a couple of minutes, but with some effort and the tools that Torque puts at your disposal, it’ll be much easier than you think.

With its full tutorials and some time, you'll soon be able to create your own games which you can then freely distribute.

In order to be able to sell them, you'll have to buy the pay version which also includes the source code and access to a private forum where you'll receive help from several experts as well as other users.