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Portal achievements, rarest first.
Every achievement in Portal, ranked by how many Steam players have unlocked it. Global completion rates from Steam, refreshed daily.
The rarest achievement
Rocket Science
2.8%
of players
- Achievements
- 15
- Rarest
- 2.8%
- Ultra rare (under 5%)
- 5
- Average completion
- 25%
1
Rocket Science
Earn silver medals on all Portal challenges.
2.8%
2
Aperture Science
Earn gold medals on all Portal challenges.
2.8%
3
Basic Science
Earn bronze medals on all Portal challenges.
2.9%
4
Camera Shy
Detach security cameras from the walls.
4.1%
5
Transmission Received
..?
4.4%
6
Terminal Velocity
Fall 30,000 feet.
9.0%
7
Vanilla Crazy Cake
Beat all six Portal advanced maps.
9.3%
8
Fruitcake
Beat four Portal advanced maps.
12%
9
Long Jump
Jump 300 feet.
14%
10
Cupcake
Beat two Portal advanced maps.
18%
11
Friendly Fire
Knock down a turret with another turret.
49%
12
Heartbreaker
Complete Portal.
52%
13
Partygoer
Make the correct party escort submission position decision.
55%
14
Fratricide
Do whatever it takes to survive.
63%
15
Lab Rat
Acquire the fully powered Aperture Science Handheld Portal Device.
81%
Percentages are Steam's global unlock rates across all players who own Portal, refreshed daily. Under 5% is marked in the lit blue.