Complete level 1-1
Complete level 1-2
Complete level 1-3
Complete level 1-4
Complete level 1-5
Complete level 1-6
Complete level 2-1
Complete level 2-2
Complete level 2-3
Complete level 2-4
Complete level 2-5
Complete level 2-6
Complete level 2-7
Complete level 2-8
Complete level 2-9
Complete secret level 1
Complete secret level 2
Complete level 3-1
Complete level 3-2
Complete level 3-3
Complete level 3-4
Complete level 3-5
Complete level 3-6
Complete level 3-7
Complete level 3-8
Complete secret level 3
Complete secret level 4
Complete level 4-1
Complete level 4-2
Complete level 4-3
Complete level 4-4
Complete level 4-5
Complete level 4-6
Complete final secret level
Complete level 1-1 with 100 percent secrets.
Complete level 1-5 with 100 percent secrets.
Complete level 2-3 with 100 percent secrets.
Complete level 2-8 with 100 percent secrets.
Complete level 3-1 with 100 percent secrets.
Complete level 3-5 with 100 percent secrets.
Complete secret level 4 with 100 percent secrets.
Complete level 3-7 with 100 percent secrets.
Complete level 4-1 with 100 percent secrets.
Complete level 4-4 with 100 percent secrets.
Complete level 1-3 with 100 percent kills on hard.
Complete level 2-2 with 100 percent kills on hard.
Complete secret level 2 with 100 percent kills on hard.
Complete level 3-2 with 100 percent kills on hard.
Complete level 3-6 with 100 percent kills on hard.
Complete level 4-2 with 100 percent kills on hard.
Complete episode 1 level 5 Abyss on hard.
Complete episode 2 level 9 Overlord on hard.
Complete episode 3 level 9 Stadium on hard.
Complete episode 4 level 6 Ministry on hard.