A variety of Infocom games are playable on ubuntu.eskimo.com.

     To play them, add /usr/games and /usr/games/infocom to your $PATH, or you can type the full path name to the game.

     To see which Infocom games are available, type “ls /usr/games/infocom“.  Then if you’ve added the above to your $PATH you can just type the game name, else /usr/games/infocom/game, for example /usr/games/infocom/zork_1 to start Zork 1.