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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 |
|---|---|---|---|
| Complete all challenges in coop mode | 1.7% | Very rare | |
| Complete all challenges in a single player mode | 3.4% | Very rare |