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New Faraday's COOPCollection by Faraday
Countdown to Extinction (Director's cut)Collection by jk7201
This is a special version of the Countdown to Extinction collection. It contains the original maps plus some extra stuff. The difficulty increases as you proceed, so following the suggested map order is highly recommended.
MidnightCollection by RectorRocks
Midnight is a seven map mappack that revolves around Chell and an unknown character as GLaDOS puts her to testing. Each level have their own achievements and ends with a post-game report, that shows which achievements were obtained and the time taken to co
Rubis Solo AdventureCollection by Rubis_et_cie
Rubis Solo Adventure is a simple serie of maps without particular story. All these maps are created in Hammer World Editor. Note that I am not really the designer of these maps. All of them are based on the maps created by the beta-testers of the Por
Portal 2: Timex PlaytestCollection by Turrets turret
A collection of some of my tests to the mod Portal 2: Timex, the first one is visible for everyone but the rest is only for friends.
Spherical TestingCollection by Team Spherical
Spherical Testing Complete Level Collection
PC Gamer: Best Portal 2 Co-Op MapsCollection by Aradalf
PC Gamer's top Portal 2 co-op maps, available here: pcgamer.com/2012/11/17/the-10-best-portal-2-co-op-maps/
Stoming The CaslteCollection by Baca
Personality Cores Bruce and Dalton, are introducing Atlas and P-Body to the simulation room. This room will allow for simulated testing in any environment imaginable. Bruce and Dalton have decided to have Atlas and P-Body storm a castle for the simulation.
The Talos Principle - TestchambersCollection by €in€r vØn vi€l€n
- The Talos Principle - This collection contains all sorts of my testchambers, which are inspired by the first-/thirdperson puzzle-adventure game "The Talos Principle". It features Lasers, Cube-Button-Basics, Turrets and more, to let the puzzles from TTP