Hello TIGers. It's been a while! I have ventured from far off internet lands in order to accomplish a goal, which is to find people on this Internet™ that are willing to play this Video Online Game with HINCHY. (Actually I've already found one, Hideous, but I am venturing here to find MORE because it's more fun the more people you have.)
Basically Sauerbraten is a first person shooter in which built in is a seamless realtime map editor using a cube-based system (although you can make fine slopes too). It's pretty damn easy to use for the depth of structures and stuff you can build with it. You can edit in real time with your friends online too, which brings the awesomeness to an even higher level. You can frag your friends all you want as well, although I'm not actually into shooters so that's not really the reason I play it (although I do it sometimes anyway). It's mainly just fun to build an awesome giant world online with your friends. And best of all, it's free and open source and is available for Windows, Mac OS X, and Linux in binary form, even with cross-platform online play. It runs on most computers too, all you'll need is a 1GHZ CPU, 256mb of RAM, and practically any graphics card made in the past 7 years (it runs fine even on my shitty Intel integrated card).
If anyone wants to play, get Skype and a microphone. (I'm kinda anal about playing online with people without voice chat, it just rubs me the wrong way.) But add me on Skype (zachhinchliffe) and I'll give you the details to my server (it's private so I'll have to let you in one-by-one, unfortunately the game doesn't have a server password thing or whatever).
http://www.sauerbraten.org/