Blow up at least four enemies with one shot

Beat the game using only your first weapon

Beat the game on hard

Find all the unique powerups, including Invisibility, the Reflector, and the Cho...

Beat the game in 90 minutes or less

Spend three minutes trying to get past the gate in the first level of the expans...

Spend three minutes trying to get past the gate in the first Egypt level

Beat the game on hard without dying using only your first weapon

Find all the secret rooms and hidden items

Destroy 20 light sources (light bulbs, etc.)