Complete the following achievements to unlock Xbox Live Gamerscore points.
| Achievement | How to unlock |
| Detective (15 points) | Find all abilities and pickups in Nite Owl mode.
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| Exterminator (8 points) | Perform 250 finishing moves.
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| Hero (36 points) | Complete the game in Nite Owl mode.
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| Psycho (36 points) | Complete the game in Rorschach mode.
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| Retaliator (8 points) | Perform 200 counter attacks.
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| Shield (8 points) | Dodge or block 25 incoming attacks.
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| Strong Arm (8 points) | Knock 100 people over, by throwing other people into them.
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| Teamwork (36 points) | Complete the game in co-op mode.
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| Thief (15 points) | Find all abilities and pickups in Rorschach mode.
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| Turbo (11 points) | Complete the game in less than 80 minutes in one session, without restarting from a checkpoint.
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| Untouchable (11 points) | Go unharmed for an entire level, without restarting from a checkpoint.
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| Vigilante (8 points) | Eliminate 20 bad guys in 101 seconds.
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