Kill 50 burning enemies in campaign mode

Kill 150 enemies using only environmental damage in campaign mode

Kill 75 enemies using sticky bombs in campaign mode

Kill 50 enraged demons in campaign mode

Kill 50 enemies with a headshot in campaign mode

Kill 500 enemies in campaign mode

Destroy 250 destructible items in campaign mode

Decapitate 50 enemies in campaign mode

Find 5 secrets

Kill 100 enemies

Use the Incinerator.

Use the hookah in "High Times".

Complete "Shrapnel City" on any difficulty.