OPEN SOURCE GAMES ON GNU/LINUX

Tested and played in Lubuntu, just do "sudo apt-get install" followed by the name here given.

ADVENTURE: beneath-a-steel-sky, flight-of-the-amazon-queen, lure-of-the-temptress, out-of-order
ARCADE: 2h4u, etw, frozen-bubble, teeworlds,
BALL GAMES: neverball, neverputt
PUZZLE: whichwayisup, connectagram, anagramarama, gnubg, blinken, brainparty, gbrainy, xsol, pokerth, kcheckers, xboard, xmpuzzles, xword, einstein, quarry, grhino, gnugo, qgo, uligo, pingus, warmux, miceamaze, xsok fillets-ng, xshisen, colorcode, kitsune, gmult, scribble, xshogi, gnome-sudoku, gtans, ltris, xwelltris, glotski, groundhog, numptyphysics, phlipple, peg-e, gmchess
ROGUELIKE: crawl, freedink, freedroidrpg, gearhead, nethack-console
SHOOT EM UP: luola, marsshooter, starfighter, slingshot, torus-trooper, uqm, xgalaga++
STRATEGY: curseofwar, liquidwar, openttd, gtkatlantic monopd, 0ad, netpanzer, unknown-horizons, warzone2100, dopewars, singularity, freeciv-client-gtk freeciv-client-extras, freeorion, lordsawar, teg, pioneers, lgeneral, triplea
VEHICLE SIMULATION: searchandrescue, armagetronad, supertuxkart, oolite, vegastrike vegastrike-music, openssn, openbve
VIRTUAL WORLD: minetest

BONUS: Games from other repositories.

PLAYDEB
opendungeons : like dungeon keeper, but up to date
openra : command and conquer red alert
megamek : mech warrior
ufoai : x com
xonotic : first person shooter
urbanterror : first person shooter
worldofpadman : first person shooter

Cataclysm, Dark Days Ahead
sudo apt-get install git
git clone git://github.com/CleverRaven/Cataclysm-DDA.git
cd Cataclysm-DDA
sudo apt-get install lua5.1 lua5.1-dev
sudo apt-get install libncurses5-dev libncursesw5-dev build-essential
make -j4 LOCALIZE=0 RELEASE=1 LUA=1

Mars Simulation Project: http://sourceforge.net/projects/mars-sim/files/latest/download
Scrabble3D: http://sourceforge.net/projects/scrabble/files/latest/download