1. Portal Achievements
  2. Rocket Science achievement
Portal

Portal

253
15
4.52
Game action
Portal
kT-Echo

kT-Echo

253
15
27 Apr 17
14h 21m
100%
kT-Echo

Rocket Science achievement in Portal

Rocket Science

Earn silver medals on all Portal challenges.

Rocket Science0
27 April 2017Offline Mode - These achievements require play in game modes that do not necessitate a connection to any online services.Single Player - These achievements can be obtained by a single player.Time/Date - These achievements require you to play the game or perform actions at certain times, within a time limit, or on specific dates.
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