Kill an enemy with an object shot with G-Lifter

Kill an enemy by falling on him

Kill a human enemy with deflected bullets

Kill a human enemy with another enemy's body

Electrocute a human enemy

Collect all upgrades

Kill 100 enemies using the Rock Blaster

Kill 100 enemies using objects shot or dropped with G-Lifter

Kill 2 or more enemies with a single exploding mechanical enemy

Collect 25% of all Gold Collectibles

Collect 50% of all Gold Collectibles

Collect 100% of all Gold Collectibles

Complete the game in 3 hours or less

Get through the challenge level 'Container Chaos'

Get through the challenge level 'Shaft Shuffle'

Get through the challenge level 'Brainyard'

Get through the challenge level 'Assembly Line'