Portal 2
Steam
- 5,827,089 Achievements Earned
- 310,906 Players Tracked
- 51 Total Achievements
- 8,881 Obtainable EXP
- 14,729 100% Club
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
14.37%
Very Rare - 259.00 EXP
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