| Achievement | How to unlock
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| - Attain three star scores for all four locations in Rescue Mode.
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| - Spend more than 50,000 bucks in Rescue mode.
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| - Kill 4 Enemies with a single grenade shot in the game.
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| - Unlock all 4 hostages in Putzki's Castle in Rescue Mode.
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| - As host, collect all nine artifacts in Rescue Mode.
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| - Melee weapon kill 100 Enemies in the game.
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| - Unlock all 4 hostages in Putzki's Pork Plant in Rescue Mode.
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| - Detonate a bomb near either G-man in the final show-down in Chapter 2.
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| - Defeat the swinging hexapod, once you see its health bar, in under 30 seconds in Chapter 5.
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| - Unlock all 4 hostages in Jungliana in Rescue Mode.
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| - Headshot kill 100 enemies in the game.
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| - Attain a 80% or higher accuracy score on a mission in Rescue Mode.
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| - Make Putzki shoot himself in Chapter 1.
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| - Find all 18 signs in all 6 chapters in Story Mode.
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- Signs of Hardboiled Chicken
| - Find 9 signs in any three chapters in Story Mode.
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| - Find all 3 signs of a single chapter in Story Mode.
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| - Drop six Space Owls into the liquid ooze in Chapter 6.
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| - Unlock 100 costume items or weapons in Rescue Mode.
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| - Complete all six chapters in Story Mode.
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| - Headshot kill 15 enemies in a row in Chapter 1.
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| - Melee kill 15 Enemies in a row without triggering the alarm in Chapter 2.
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| - Get someone to tell you what's up ahead in Chapter 1.
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| - Make enemies kill 15 co-workers in Chapter 2.
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| - Unlock Hardboiled Chicken for Rescue Mode in the game.
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- The Search and Rescue Strikeforce
| - As host, complete a rescue mission for all four locations in Rescue Mode.
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| - Stand on the Hexapod's Nose while it is firing its missiles in Chapter 4.
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| - Kill all enemies during Hardboiled's final, successful escape in Chapter 6.
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| - Unlock all 4 hostages in the UFO in Rescue Mode.
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