Apple IIGS Games from the Skunk Works BBS Archive:

BA.DEMO.SHK     Demo of Battle Axe, an Ultima VI clone
BILLE.SDK       "Bille Art", a sorta-pool game from a new French free-tools group.  For the IIgs, works on ROM 01 and 03, and I think it needs a 1.25 megs.
BULLA.SHK       ACS/FTA's Bulla I demo disk.  Much like their earlier ACS disks, Bulla isn't the only thing on the disk; there also are 7 other mini-demos, including Vector Balls, a diagonal scroller, and a rotating Coke can.
DLX.TETRIS.SHK  Demo of a Tetris clone
DRGNWRSDEMO.SHK Dragon Wars demo
DUELTRIS.SHK    Two-player Tetris variant
EXPLORER.SHK    Explorer GS, a game (probably an adventure-type game)
FLY.DEMO.SDK    The Fly, a combination demo/game
FUN.COLUMNS.SHK Fun Columns, a variation of the game Columns by the FTA
GAMENDAS12.SHK  triple-pack of Game NDAs--upgrade.  The files included are MineHunt, Power Grid, and MultiTris.  New features include a better GUI and a piece editor for MultiTris.
GS.INVADERS.SHK A demo for a possibly-upcoming GS version of the arcade classic Space Invaders
HDINSTALL1.SDK  HD Install lets you install a number of different games on your hard drive...but the documentation is in French, so consider yourself warned.  This is disk 1 of a 2-disk set.
HDINSTALL2.SDK  Disk 2 of HD Install
HOVER.DEMO.SHK  Hoverblade demo
MAHJONGG.SHK    Mah Jongg, an old Chinese game (Shanghai is a commercial version of this game)
MORIAGS1.SHK    GS port of a UNIX-based role-playing game
GAME.NDAS.SHK   3 game NDAs
OIL.LANDER.SHK  Oil Lander, a game
ONEARMBATL.SHK  One-Armed Battle, a shareware game
PACMAN.SHK      The classic arcade game Pac-Man in NDA form
PLOTTING.SHK    Plotting, a game that I think is supposed to be patterned after either an arcade game or a game for another computer
SPCACESOLVE.SHK Cheat sheet for Space Ace
HARRIER.SDK     Space Harrier, the game from FTA
SPCWHSKY101.SHK Space Whiskey
SPYHUNTER.SHK   SpyHunter GS
STARCMD048.SHK  Star Command v0.4.8b1, a public-beta version of a new game
STARWIZ.SDK     Star Wizard
SWORDSODAN.SDK  Sword of Sodan demo for the GS w/1 meg or so of RAM.  Unpacks to a blank 3.5" disk.  Has amazing graphics and sounds, including 4-plane scrolling animation and huge moving sprites.  The game was never released.
T.FORCEDEMO.SDK Demo of some game; can't recall the name offhand
TINIESGS.SHK    The Tinies, a silly little game