Cube 2: Sauerbraten Trooper Edition has been released [download]: new logo, new maps, new weapon looks, bots! (from BloodFrontier), movie recording function (I have to check this out ASAP), rag dolls, new music, and so much more.
Sauerbraten characters
The bots are rather dumb as of now and don not know what a powerup is yet but they're definitely better than no bots at all. What I found most amazing about this release is the characterization of the player models. Each of the three has a little back story. I felt that Sauerbraten had no soul before this release. Now it has a little soul. :)
Mark IVThe tank simulation engine Mark IV [project, web page, blog] v0.80 Alpha-1 is out and first-time playable over network. It however uses FMOD (which can be avoided, see this) and RakNet. Windows users will be able to use the pre-compiled binary.
A little arcade
Atomic Worm has recently been open sourced. It appears to be a Pacman-Snake mix plus different grid types plus the visual style of Transcend. Source available here. It uses the PopCap Framework, which appears to be free software.
Atomic Worm at YouTube
Do you like cruel, hard moon lander games? If yes, OldSkoolGravityGame was made with you in mind! It may look harmless, even retro-pretty on video... but I have felt the pain...
O_O
Portable game packages
DSN
The Damn Small Nexuiz (DSN) project provides a slim version of Nexuiz with the aim to make it playable on netbooks. Deja Vu?
Speaking of reduced weight: Spring RTS Engine Portable is a win32 Spring (RTS engine) package that doesn't touch the registry.