41 / 50 (82%)
Gamerscore 715 / 1000

Found 9 achievements for Gamerscore 285

There are 50 total achievements for Gamerscore 1000

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  • Schrodinger's Catch 743
    Catch a blue-painted box before it touches the ground
    Gamerscore 20
    Score
    37%
    Uncommon
  • Door Prize 747
    Examine all the vitrified test chamber doors
    Gamerscore 20
    Score
    37%
    Uncommon
  • Smash TV 645
    Break 11 test chamber monitors
    Collectible Cumulative
    Gamerscore 75
    Score
    32%
    Uncommon
  • Iron Grip 578
    Never lose a cube in Chamber 6 of the Mass and Velocity co-op course
    Gamerscore 20
    Score
    29%
    Rare
  • Party of Three 617
    Find the hidden companion cube in co-op test chamber
    Gamerscore 25
    Score
    31%
    Uncommon
  • Professor Portal 515
    After completing co-op, complete Calibration Course online with a friend who hasn’t played before
    Online Viral
    Gamerscore 75
    Score
    25%
    Rare
  • Portal Conservation Society 564
    Complete Chamber 3 in the Hard-Light Surfaces co-op course using only 5 total portal placements
    Gamerscore 20
    Score
    28%
    Rare
  • Triple Crown 510
    Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
    Cumulative Time-Limited
    Gamerscore 15
    Score
    25%
    Rare
  • Still Alive 449
    Complete Course 4 with neither you nor your co-op partner dying
    Gamerscore 15
    Score
    22%
    Rare

Showing 9 of 50 achievements total