From Ren'Py

Ren'Py 4.6 "Start your Engines!"

Ren'Py 4.6 "Start your Engines!" was released on February 8, 2005. It comes with a demo game intended to show off some of the features of the engine. The demo game was updated in version 4.6.

• Download the release, including source and Windows binaries. (2.8 MB)
• View the included Ren'Py tutorial.
• View the script of the demo. (colored)
• View the changelog.

This version contains a major memory leak bug, and shouldn't be used for releases.