Platinum Arts
I found this cool sandbox game that is completely free, and requires no game installations except the source itself.
-From Fileplanet:
"Platinum Arts Sandbox is a game design tool that allows users to quickly and easily create and edit their own worlds in game, even cooperatively. It is free, open source, and easy to use. In addition it now features cart mode where players can create their own race courses and drive on it with an ogre riding his hovercart! Also, it now features updated particle menus where players can easily create their own particle effects. Platinum Arts Sandbox is a great world/level creation tool for all levels of developers and ages! Be sure to check out the wiki if you need any help."
You can check it out HERE!
-From Fileplanet:
"Platinum Arts Sandbox is a game design tool that allows users to quickly and easily create and edit their own worlds in game, even cooperatively. It is free, open source, and easy to use. In addition it now features cart mode where players can create their own race courses and drive on it with an ogre riding his hovercart! Also, it now features updated particle menus where players can easily create their own particle effects. Platinum Arts Sandbox is a great world/level creation tool for all levels of developers and ages! Be sure to check out the wiki if you need any help."
You can check it out HERE!
Comments
I created one map and you may want it.
Test it out