Find Luke in the Level "Lunar Reactor".

Finish a secret level.

Step on 40 enemies after using the Shrinker on them.

Use the Incinerator.

Kill 5 bad guys with one shot.

Finish the "Hollywood Holocaust" level in under 3 minutes.

Kill 10 bad guys in 10 seconds while on steroids.

Use the hookah in "High Times".

Tip an exotic dancer.

Get praised by Jessie at the end of the motorcycle mini-game.

Defeat the Pride and Joy prototype.

Learn all enemy skills.

Complete all quests.