You must play through all levels.

You must complete all levels on the Hard difficulty setting.

You must play through all levels without dying in any level.

You must play through the entire Cosmic Combat level.

You must play through the entire Deep Sea Danger level.

You must play through the entire Emperor's Tomb level.

You must play through the entire Graveyard Gunfight level.

You must play through the entire Insect Invasion level.

You must play through the entire Robot Rebellion level.

You must play through any level in 3D.

You must play through any level using only the single shot weapon.

You must play through and complete any level without dying.

You must kill 100 ants in one play through of Insect Invasion.

You must destroy all the ship reactors in one play through of Cosmic Combat.

You must destroy all the mines in one play through of Deep Sea Danger.

You must shoot all bottles in Graveyard Gunfight.

You must destroy all mines in one play through of Robot Rebellion.

You must get a hit streak of 20 shots in any level.

Earn a score of at least 75,000 points in any one level.

You must steal the Idol from the Emperor's Tomb.