Stars! Nova is a clone of the classic 4X space strategy game Stars!. While nowhere near the functionality of Stars! quite a few features have been implemented so far. See the Nova web page for details.
Xivio.com was a commercial children's virtual world website created in 2006 by Gavin Conrad. This is the legacy World Server Java Core made available to the world to do with as it wishes.
A currently unfinished mod for half-life 2 that includes co-op and deathmatch maps, however cheats need to be enabled to get the real feeling of gameplay.
list of debug keys
(require "sv_cheats" to be set to 1)
pressing "i" gives all weapons and equipment
pressing "o" spawns an antlion
pressing "v" activates/deactivates no clipping mode, which allows you to freely fly around the map without brushes or entities getting in your way
credit to some users on gamebanana for some content...
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