01Achievements
Every Portal achievement, ordered by how few players in the world have unlocked it.
4 of 15 entries
HeartbreakerComplete Portal.52.1%Common
PartygoerMake the correct party escort submission position decision.55.4%Common
FratricideDo whatever it takes to survive.63.2%Common
Lab RatAcquire the fully powered Aperture Science Handheld Portal Device.80.9%Common
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