Set ballerina score on one level, and be fabulous.

Kill an enemy with an exploding barrel.

Kill 25 enemies with the CSMG-19 silenced machine gun (cannot be completed in multiplayer).

Use the chainsaw to kill 20 enemies in DOOM 3

Blow up 50 barrels in the DOOM 3, RoE, or Lost Mission campaigns

Defeat 1,000 enemies.

Snap your first photo.

Kill an enemy with 1 health remaining in DOOM 3, RoE, or Lost Mission

Enter the mines

Proceed to the mining complex

Destroy 5 enemy tanks

Destroy the cruiser