Paintown
If you are looking for a side-scrolling, action packed game like you used to play look no further. Paintown supports user created content through a mod system and user defined functionality through scripting.
Paintown is completely free!
Features
- Low CPU and GPU requirements
- Network play
- Dynamic lighting
- Joystick support
- mod/s3m/xm/it music modules
- Scripting with python
- M.U.G.E.N engine
Other Free Windows 7 Software
Screenshots

Requirements:
- Pentium II CPU 350 MHz or higher.!!
- 64 MB of RAM.
- Intel Pentium 233 Mhz (or equivalent processor, such as AMD) or better.
- 256 MB Ram , better 512 MB or more !!