Kill 1000 zombies.

Take 100 headshots.

Kill 100 zombies.

Kill 10 bosses.

Kill 10 cockroaches.

Kill 10 zombies.

Kill 1 boss.

Kill 1 cockroach.

Kill 5 bosses.

Kill 5 cockroaches.

Pick up the AKM from the table.

Pick up the axe from the table.

Die for the first time.

Escape from the asylum.

Pick up the flare gun from the table.

Pick up the flashlight that is next to the corpse.

Pick up the hunting rifle from the table.

Pick up the M1911 from the table.

Pick up the MP5 from the table.

Pick up the R870 from the table.

Read the Devil's book.

Read the elevator instructions.

Pick up the revolver from the table.

Use 1 syringe.

Pick up the Double Bar Shotgun.

Pick up the F1.

Accumulate 1.000.000 points in horde mode.

Accumulate 100.000 points in horde mode.

Accumulate 10.000 points in horde mode.

Get 10 ammo in horde mode.

Get 10 life in horde mode.

Beat 10 waves in horde mode.

Get 10 X2 in horde mode.

Get 1 ammo in horde mode.

Get 1 life in horde mode.

Get 1 X2 in horde mode.

Beat 25 waves in horde mode.

Beat 50 waves in horde mode.

Beat 5 waves in horde mode.

Open the end door in horde mode.

Pick up the M1A.