- Shisen
- 
puzzle game for GNUstep
- showfigfonts
- 
prints a list of available figlet fonts
- sierpinski
- 
draws Sierpinski triangle fractals
- sierpinski3d
- 
3D Sierpinski triangle fractal.
- sillypoker
- 
sillypoker
- sixteen
- 
tile manipulation puzzle game
- sjeng
- 
Chess program which supports several variants
- sky
- 
science fiction adventure game
- sl
- 
display animations aimed to correct users who accidentally enter
sl
instead of 
ls.
- sl-h
- 
display animations aimed to entertain users who liked to see SL runs
on their screen.
- slant
- 
topological deduction game
- slashem
- 
Exploring The Mazes of Menace
- slidescreen
- 
permute the screen image like an 8-puzzle
- slip
- 
sucks your screen into a jet engine
- slune
- 
a fun 3D racing game
- snake
- 
snake ,
- snake4
- 
Game starring a fruit-eating snake.
- sndserv
- 
sound effects server for lxdoom and related games
- snes9express
- 
frontend to snes9x
- snipes
- 
a text maze game
- snmp
- 
The SNMP Application
- solarwolf
- 
Collect the boxes and don't become mad
- solo
- 
puzzle game based on Sudoku
- sonar
- 
display a sonar scope
- sopwith
- 
classic aerial combat shoot em up game
- spacearyarya
- 
a third person shoot'em-up
- speedmine
- 
simulates speeding down a rocky mineshaft, or a funky dancing worm
- spellcast
- 
a game of duelling wizards
- sphere
- 
draws shaded spheres
- spheremonics
- 
3d spherical harmonic shapes.
- spiral
- 
draws moving circular spiral patterns
- spotlight
- 
move spotlight around desktop
- sproingies
- 
Q-Bert meets Marble Madness!
- spruch
- 
print a random German adage
regeln - print a random German peasant's maxim
- squiral
- 
square spirals screensaver
- ssl
- 
The SSL Application
- stairs
- 
Escher's infinite staircase.
- starfighter
- 
2D scrolling shooter game
- starfish
- 
radially-symmetric throbbing colormap-hacking graphics demo
- starvoyager
- 
'Star Trek' themed 2D space arcade game
- starwars
- 
draws a perspective text crawl, like at the beginning of the movie
- stax
- 
Stax is a collection of puzzle games.
- stella
- 
Atari 2600 emulator (SDL version)
xstella - Atari 2600 emulator (X11 version)
- StepBill
- 
classic computer game
- stonerview
- 
3D undulating ribbons of squares.
- strange
- 
draws strange attractors
- stratagus
- 
Realtime strategy game
- stratagus-bos
- 
wrapper for launching stratagus with BoS as dataset
- substrate
- 
Grow crystal-like lines on a computational substrate
- superquadrics
- 
morphing 3d shapes.