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to keep track of what you have here — unlocked entries stay ticked off, and you can filter down to what is left.
Data from Steam — Steam Web API Terms of Use. Last updated .
| Achievement | How to unlock | Unlocked by | Rarity |
|---|---|---|---|
| Finish any level using just pistol | 1.4% | Very rare | |
| Finish PvP match with highest score in any mode | 2.1% | Very rare | |
| Mark special zombies 50 times | 3.2% | Very rare | |
| Walk into toxic cloud 100 times | 4.5% | Very rare | |
| Finish 100 games in PvE |
| Very rare |