There is currently no guide for this achievement.
Confidence Building
Complete all test chambers in the Mass and Velocity co-op course
| Game: | Portal 2 |
|---|---|
| Service: | |
| Rarity: | 40.60% (Uncommon) |
| Tags: | (None) |
Complete all test chambers in the Mass and Velocity co-op course
| Game: | Portal 2 |
|---|---|
| Service: | |
| Rarity: | 40.60% (Uncommon) |
| Tags: | (None) |
There is currently no guide for this achievement.
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