OpenRCT2 - Messing Around With Cheats

openrct2.org/

Even in such an early stage in development, this mod/open source version of RCT2 is already one of the best modifications for any game I've ever played. It basically makes an already fun game much more fun, adding improvements such as bugfixes, multiplayer, cheats, higher resolution support, etc. and it's opensource of course, making it easy to mod. I can't even begin to imagine how much more fun RCT2 can get when people create mods for this.

But seriously, the cheats are amazing. Like, look at how fast you can make roller coasters go, it's insane.