ttosttoss@aburra:~$ echo $PATH /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games ttosttoss@aburra:~$
Maybe the game isn't really installing under /usr/games ?
ttosttoss@aburra:~$ echo $PATH lightdm/ lightdm: /usr/local/ sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin:/usr/ games
/usr/lib/
ttosttoss@aburra:~$
Maybe the game isn't really installing under /usr/games ?