Complete level 1-1 on any difficulty

Complete level 1-2 on any difficulty

Defeat Hans Grosse and complete level 1-3 on any difficulty

Complete level 2-1 on any difficulty

Complete level 2-2 on any difficulty

Complete level 2-3 on any difficulty

Vanquish Trans Grosse and complete level 2-4 on any difficulty

Complete level 3-1 on any difficulty

Complete level 3-2 on any difficulty

Complete level 3-3 on any difficulty

Terminate Dr. Schabbs and complete level 3-4 on any difficulty

Complete level 3-5 on any difficulty

Complete level 4-1 on any difficulty

Complete level 4-2 on any difficulty

Complete level 4-3 on any difficulty

Complete level 4-4 on any difficulty

Destroy the Ubermutant and complete level 4-5 on any difficulty

Complete level 5-3 on any difficulty

Complete level 5-4 on any difficulty

Complete level 5-5 on any difficulty

Slay the Death Knight and complete level 5-6 on any difficulty

Complete level 6-1 on any difficulty

Complete level 6-2 on any difficulty

Complete level 6-3 on any difficulty

Complete level 6-4 on any difficulty

Complete level 6-5 on any difficulty

Kill Hitler and destroy the Third Reich by completing level 6-6 on any difficulty

Complete level 6-7 on any difficulty

Complete level 1-1 with a Perfect rank on any difficulty

Complete level 1-2 with a Perfect rank on any difficulty

Complete level 1-3 with a Perfect rank on any difficulty

Complete level 2-1 with a Perfect rank on any difficulty

Complete level 2-2 with a Perfect rank on any difficulty

Complete level 2-3 with a Perfect rank on any difficulty

Complete level 2-4 with a Perfect rank on any difficulty

Complete level 3-1 with a Perfect rank on any difficulty

Complete level 3-2 with a Perfect rank on any difficulty

Complete level 3-3 with a Perfect rank on any difficulty

Complete level 3-4 with a Perfect rank on any difficulty

Complete level 3-5 with a Perfect rank on any difficulty

Complete level 4-1 with a Perfect rank on any difficulty

Complete level 4-2 with a Perfect rank on any difficulty

Complete level 4-3 with a Perfect rank on any difficulty

Complete level 4-4 with a Perfect rank on any difficulty

Complete level 4-5 with a Perfect rank on any difficulty

Complete level 5-1 with a Perfect rank on any difficulty

Complete level 5-2 with a Perfect rank on any difficulty

Complete level 5-3 with a Perfect rank on any difficulty

Complete level 5-4 with a Perfect rank on any difficulty

Complete level 5-5 with a Perfect rank on any difficulty

Complete level 5-6 with a Perfect rank on any difficulty

Complete level 6-1 with a Perfect rank on any difficulty

Complete level 6-2 with a Perfect rank on any difficulty

Complete level 6-3 with a Perfect rank on any difficulty

Complete level 6-4 with a Perfect rank on any difficulty

Complete level 6-5 with a Perfect rank on any difficulty

Complete level 6-6 with a Perfect rank on any difficulty

Complete level 6-7 with a Perfect rank on any difficulty

Complete level 1-1 on Maximum Death difficulty

Complete level 1-2 on Maximum Death difficulty

Complete level 1-3 on Maximum Death difficulty

Complete level 2-1 on Maximum Death difficulty

Complete level 2-2 on Maximum Death difficulty

Complete level 2-3 on Maximum Death difficulty

Complete level 2-4 on Maximum Death difficulty

Complete level 3-2 on Maximum Death difficulty

Complete level 3-3 on Maximum Death difficulty

Complete level 3-5 on Maximum Death difficulty

Complete level 4-2 on Maximum Death difficulty

Complete level 4-3 on Maximum Death difficulty

Complete level 4-5 on Maximum Death difficulty

Complete level 5-2 on Maximum Death difficulty

Complete level 5-4 on Maximum Death difficulty

Complete level 5-5 on Maximum Death difficulty

Complete level 6-1 on Maximum Death difficulty

Complete level 6-2 on Maximum Death difficulty

Complete level 6-4 on Maximum Death difficulty

Complete level 6-6 on Maximum Death difficulty

Complete level 1-1 on any difficulty under the par time of 00:45

Complete level 1-2 on any difficulty under the par time of 00:45

Complete level 2-1 on any difficulty under the par time of 01:15

Complete level 2-2 on any difficulty under the par time of 01:45

Complete level 2-4 on any difficulty under the par time of 01:00

Complete level 3-2 on any difficulty under the par time of 02:00

Complete level 3-4 on any difficulty under the par time of 01:00

Complete level 3-5 on any difficulty under the par time of 02:45

Complete level 4-2 on any difficulty under the par time of 01:45

Complete level 4-4 on any difficulty under the par time of 02:30

Complete level 4-5 on any difficulty under the par time of 02:00

Complete level 5-2 on any difficulty under the par time of 02:00

Complete level 5-3 on any difficulty under the par time of 01:45

Complete level 5-5 on any difficulty under the par time of 02:15

Complete level 6-1 on any difficulty under the par time of 04:00

Complete level 6-3 on any difficulty under the par time of 04:15

Complete level 6-4 on any difficulty under the par time of 04:45

Complete level 6-6 on any difficulty under the par time of 04:00

Time for an upgrade! Get a Machine Gun

This looks familiar! Loot a Chain Gun

Time to blow stuff up! Obtain a Rocket Launcher

Fatally stab 15 enemies with your Knife without dying

Mow down 50 Nazis with your Machine Gun without dying

Melt 25 enemies with your Flamethrower without dying

Obliterate 15 enemies with your Rocket Launcher without dying

Crank out some tunes in the Music Test screen

Complete level 5-2 on any difficulty

Complete level 3-1 on Maximum Death difficulty

Complete level 3-4 on Maximum Death difficulty

Complete level 4-1 on Maximum Death difficulty

Complete level 4-4 on Maximum Death difficulty

Complete level 5-1 on Maximum Death difficulty

Complete level 5-3 on Maximum Death difficulty

Complete level 5-6 on Maximum Death difficulty

Complete level 6-3 on Maximum Death difficulty

Complete level 6-5 on Maximum Death difficulty

Complete level 6-7 on Maximum Death difficulty

Complete level 1-3 on any difficulty under the par time of 00:45

Complete level 2-3 on any difficulty under the par time of 01:45

Complete level 3-1 on any difficulty under the par time of 01:15

Complete level 3-3 on any difficulty under the par time of 02:45

Complete level 4-1 on any difficulty under the par time of 01:30

Complete level 4-3 on any difficulty under the par time of 01:15

Complete level 5-1 on any difficulty under the par time of 01:45

Complete level 5-4 on any difficulty under the par time of 02:30

Complete level 5-6 on any difficulty under the par time of 04:00

Complete level 6-2 on any difficulty under the par time of 04:45

Complete level 6-5 on any difficulty under the par time of 04:15

Complete level 6-7 on any difficulty under the par time of 02:00

Things are heating up! Pick up a Flamethrower

Pew pew! Kill 25 enemies with your Pistol without dying

Deliver a fatal dose of lead poisoning to 50 enemies with your Chain Gun without dying

Look beyond reality and activate Debug Mode

Complete level 5-1 on any difficulty