Kill a Gorilla within 5 seconds on difficulty Hard or higher

Kill a Gorilla within 5 seconds on difficulty Insane

Complete all Bezoar levels on difficulty Hard or higher

Complete any other level than the first one with no deaths on difficulty Hard

Collect 20 full N.A.N.O. bars

Kill 1000 enemies

Kill 200 enemies using environmental damage only

Destroy 500 destructible items

Find 25 secrets

Kill 20 enemies within 15 seconds on difficulty Easy or higher

Kill 20 enemies within 15 seconds on difficulty Normal or higher

Kill 20 enemies within 15 seconds on difficulty Hard or higher

Kill 20 enemies within 15 seconds on difficulty Insane

Kill 10 enemies with one shot on difficulty Easy or higher

Kill 10 enemies with one shot on difficulty Normal or higher

Kill 10 enemies with one shot on difficulty Hard or higher

Kill 10 enemies with one shot on difficulty Insane

Kill 2 Gorillas within 20 seconds on difficulty Easy or higher Easy or higher

Kill 2 Gorillas within 20 seconds on difficulty Normal or higher

Kill 2 Gorillas within 20 seconds on difficulty Hard or higher

Kill 2 Gorillas within 20 seconds on difficulty Insane

Destroy the Caul-Dron on difficulty Easy or higher

Destroy the Caul-Dron on difficulty Normal or higher

Destroy the Caul-Dron on difficulty Hard or higher