Complete Stage 1
Complete Stage 2
Complete Stage 3
Complete Stage 4
Complete Stage 5
Complete Stage 6
Complete Stage 7
Complete Stage 8
Complete Stage 9
Complete Stage 10
Complete Stage 11
Complete Stage 12
Complete Stage 13
Complete Stage 14
Complete Stage 15
Complete Stage 16
Complete Stage 17
Complete Stage 18
Complete Stage 19
Complete Stage 20
Complete Stage 21
Complete Stage 22
Complete Stage 23
Complete Stage 24
Complete Stage 25
Complete Stage 26
Complete Stage 27
Complete Stage 28
Complete Stage 29
Complete Stage 30
Obtain the Good Ending
Obtain the Normal Ending
Obtain the Bad Ending
Complete Stage 1 using only the Pistol (Normal or Hard)
Complete Stage 2 using only the Pistol (Normal or Hard)
Complete Stage 3 using only the Pistol (Normal or Hard)
Complete Stage 4 using only the Pistol (Normal or Hard)
Complete Stage 5 using only the Pistol (Normal or Hard)
Complete Stage 6 using only the Pistol (Normal or Hard)
Complete Stage 7 using only the Pistol (Normal or Hard)
Complete Stage 8 using only the Pistol (Normal or Hard)
Complete Stage 9 using only the Pistol (Normal or Hard)
Complete Stage 10 using only the Pistol (Normal or Hard)
Complete Stage 11 using only the Pistol (Normal or Hard)
Complete Stage 12 using only the Pistol (Normal or Hard)
Complete Stage 13 using only the Pistol (Normal or Hard)
Complete Stage 14 using only the Pistol (Normal or Hard)
Complete Stage 15 using only the Pistol (Normal or Hard)
Complete Stage 16 using only the Pistol (Normal or Hard)
Complete Stage 17 using only the Pistol (Normal or Hard)
Complete Stage 18 using only the Pistol (Normal or Hard)
Complete Stage 19 using only the Pistol (Normal or Hard)
Complete Stage 20 using only the Pistol (Normal or Hard)
Complete Stage 21 using only the Pistol (Normal or Hard)
Complete Stage 22 using only the Pistol (Normal or Hard)
Complete Stage 23 using only the Pistol (Normal or Hard)
Complete Stage 24 using only the Pistol (Normal or Hard)
Complete Stage 25 using only the Pistol (Normal or Hard)
Complete Stage 26 using only the Pistol (Normal or Hard)
Complete Stage 27 using only the Pistol (Normal or Hard)
Complete Stage 28 using only the Pistol (Normal or Hard)
Complete Stage 29 using only the Pistol (Normal or Hard)
Complete Stage 30 using only the Pistol (Normal or Hard)
Complete Stage 31 using only the Pistol (Normal or Hard)
Complete Stage 1 without picking up any Med Kits (Normal or Hard)
Complete Stage 2 without picking up any Med Kits (Normal or Hard)
Complete Stage 3 without picking up any Med Kits (Normal or Hard)
Complete Stage 4 without picking up any Med Kits (Normal or Hard)
Complete Stage 5 without picking up any Med Kits (Normal or Hard)
Complete Stage 6 without picking up any Med Kits (Normal or Hard)
Complete Stage 7 without picking up any Med Kits (Normal or Hard)
Complete Stage 8 without picking up any Med Kits (Normal or Hard)
Complete Stage 9 without picking up any Med Kits (Normal or Hard)
Complete Stage 10 without picking up any Med Kits (Normal or Hard)
Complete Stage 11 without picking up any Med Kits (Normal or Hard)
Complete Stage 12 without picking up any Med Kits (Normal or Hard)
Complete Stage 13 without picking up any Med Kits (Normal or Hard)
Complete Stage 14 without picking up any Med Kits (Normal or Hard)
Complete Stage 15 without picking up any Med Kits (Normal or Hard)
Complete Stage 16 without picking up any Med Kits (Normal or Hard)
Complete Stage 17 without picking up any Med Kits (Normal or Hard)
Complete Stage 18 without picking up any Med Kits (Normal or Hard)
Complete Stage 19 without picking up any Med Kits (Normal or Hard)
Complete Stage 20 without picking up any Med Kits (Normal or Hard)
Complete Stage 21 without picking up any Med Kits (Normal or Hard)
Complete Stage 22 without picking up any Med Kits (Normal or Hard)
Complete Stage 23 without picking up any Med Kits (Normal or Hard)
Complete Stage 24 without picking up any Med Kits (Normal or Hard)
Complete Stage 25 without picking up any Med Kits (Normal or Hard)
Complete Stage 26 without picking up any Med Kits (Normal or Hard)
Complete Stage 27 without picking up any Med Kits (Normal or Hard)
Complete Stage 28 without picking up any Med Kits (Normal or Hard)
Complete Stage 29 without picking up any Med Kits (Normal or Hard)
Complete Stage 30 without picking up any Med Kits (Normal or Hard)
Complete Stage 31 without picking up any Med Kits (Normal or Hard)
Complete Stage 1 on Hard Difficulty
Complete Stage 2 on Hard Difficulty
Complete Stage 3 on Hard Difficulty
Complete Stage 4 on Hard Difficulty
Complete Stage 5 on Hard Difficulty
Complete Stage 6 on Hard Difficulty
Complete Stage 7 on Hard Difficulty
Complete Stage 8 on Hard Difficulty
Complete Stage 9 on Hard Difficulty
Complete Stage 10 on Hard Difficulty
Complete Stage 11 on Hard Difficulty
Complete Stage 12 on Hard Difficulty
Complete Stage 13 on Hard Difficulty
Complete Stage 14 on Hard Difficulty
Complete Stage 15 on Hard Difficulty
Complete Stage 16 on Hard Difficulty
Complete Stage 17 on Hard Difficulty
Complete Stage 18 on Hard Difficulty
Complete Stage 19 on Hard Difficulty
Complete Stage 20 on Hard Difficulty
Complete Stage 21 on Hard Difficulty
Complete Stage 22 on Hard Difficulty
Complete Stage 23 on Hard Difficulty
Complete Stage 24 on Hard Difficulty
Complete Stage 25 on Hard Difficulty
Complete Stage 26 on Hard Difficulty
Complete Stage 27 on Hard Difficulty
Complete Stage 28 on Hard Difficulty
Complete Stage 29 on Hard Difficulty
Complete Stage 30 on Hard Difficulty
Complete Stage 31 on Hard Difficulty
Complete Stage 1 on Sudden Death Mode
Complete Stage 2 on Sudden Death Mode
Complete Stage 3 on Sudden Death Mode
Complete Stage 4 on Sudden Death Mode
Complete Stage 5 on Sudden Death Mode
Complete Stage 6 on Sudden Death Mode
Complete Stage 7 on Sudden Death Mode
Complete Stage 8 on Sudden Death Mode
Complete Stage 9 on Sudden Death Mode
Complete Stage 10 on Sudden Death Mode
Complete Stage 11 on Sudden Death Mode
Complete Stage 12 on Sudden Death Mode
Complete Stage 13 on Sudden Death Mode
Complete Stage 14 on Sudden Death Mode
Complete Stage 15 on Sudden Death Mode
Complete Stage 16 on Sudden Death Mode
Complete Stage 17 on Sudden Death Mode
Complete Stage 18 on Sudden Death Mode
Complete Stage 19 on Sudden Death Mode
Complete Stage 20 on Sudden Death Mode
Complete Stage 21 on Sudden Death Mode
Complete Stage 22 on Sudden Death Mode
Complete Stage 23 on Sudden Death Mode
Complete Stage 24 on Sudden Death Mode
Complete Stage 25 on Sudden Death Mode
Complete Stage 26 on Sudden Death Mode
Complete Stage 27 on Sudden Death Mode
Complete Stage 28 on Sudden Death Mode
Complete Stage 29 on Sudden Death Mode
Complete Stage 30 on Sudden Death Mode
Complete Stage 31 on Sudden Death Mode
Get 100 kills with the Pistol
Get 100 kills with the Machine Gun
Get 100 kills with the Shotgun
Get 20 kills with the Silenced Pistol
Get 15 kills with the Rocket Launcher
In a single stage, score 25 Lethal Hits on enemies
Finish the game in 3 hours or less (Normal or Hard)
Finish the game with at least 20,000 points
Finish the game with at least 31,000 points