Here is the full list of all 25 Spirits of Xanadu achievements.
Get killed by the suicide droid
Score a basketball goal
Obtain every page
Obtain every audiolog
Smoke yourself to death
Unlock the bonus mini-games
Experience an attack of flatulence
Destroy a robot with the showers
Get killed by the environment
Beat the game without dying
Get drunk
Beat the game in 10 minutes or less
Put every toilet seat up
Eat every donut
Scan the Xanadu with the Survey Bot
Destroy 3 bots in 2 seconds or less
Obtain every weapon
Boil away all the water and burn the toast
Become king of the zombies
Destroy every cleaner bot
Find and read "The Unusual Death of Governor Li"
Read every e-mail
Fly the Xanadu back to Earth
Fly the Xanadu into a star
Stay aboard the Xanadu