- pulsar
- 
intersecting planes, alpha blending, fog, and textures.
- purity
- 
purity
- a general purpose purity test
- pxboard
- 
a script to pipe games into xboard
- pydance
- 
a dancing simulator game
- pyro
- 
simulate fireworks
- pysol
- 
a collection of more than 200 solitaire games
- pytris
- 
two players console tetris game
- qgo
- 
Go client and full featured SGF editor
- qix
- 
bounce colored lines around a window
- quake2
- 
popular 3D action game
- queen
- 
fantasy adventure game
- queens
- 
n queens screensaver
- quiz
- 
quiz
- rafkill
- 
a vertical shoot'em-up
- rain
- 
rain
- random
- 
random
- razzle
- 
- rd-bomb
- 
reaction/diffusion textures
- recover
- 
recover a NetHack game interrupted by disaster
- rect
- 
puzzle game based on Divide by Squares
- rig
- 
Random Identity Generator
- ripples
- 
interference patterns.
- risk
- 
start up a single-player version of risk
- robotfindskitten
- 
robotfindskitten
- robots
- 
robots
- rockdodger
- 
dodge and blow up rocks with your spaceship
- rocks
- 
animation of flying through an asteroid field
- rogue
- 
rogue
- rolldice
- 
rolls virtual dice
- rorschach
- 
simulate ink-blot patterns
- rotor
- 
screen saver.
- rotzoomer
- 
animated rotations and scalings of portions of the screen
- rrootage
- 
an abstract arcade shooter
- rubik
- 
screen saver that solves Rubik's Cube.
- runtime_tools
- 
The Runtime tools Application
- sabre
- 
SVGAlib fighter plane simulator
- sail
- 
multi-user wooden ships and iron men
- samegame
- 
puzzle game
- sarien
- 
a Sierra AGI resource interpreter engine
- sasl
- 
The SASL Application
- sballs
- 
draws balls spinning like crazy in GL
- schafkopf
- 
a popular Bavarian card game for KDE
- scorched3d
- 
3D game similar to Scorched Earth
- scottfree
- 
interpreter for Scott Adams database game files
- scrabble
- 
popular crossword game
- scummvm
- 
scummvm
- sear
- 
a 3D client for World Forge game servers.
- SearchAndRescue
- 
Air rescue flight simulator
- sex
- 
have sex
- shadebobs
- 
oscillating vapor trails.