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Tlin's RechearchCollection by Tlin
B for the BCollection by smartsoldier
All the Brother for the Brother maps.
UZEL TESTCollection by Aleksandr ice
Set of cameras from Alexander Pugachev. Test yourself on the strength!
Alice's Aperture AdventureCollection by NEON_Hack90
Follow the mind of Alice as she enters Aperture Science Testing All Puzzles are are novice- to- intermidiate leved for this collection)
The Tiny Testing InitiativeCollection by Vesper
Hello and welcome to Aperture's Tiny Testing Initiative. This collection contains test chambers that are small in every way: tiny space, tiny completion time, even tiny names! WARNING Do not play these maps if you have claustrophobia.
CubemaniaCollection by rinie
Test ChambersCollection by Bigbuzzer
Super Test RoomCollection by lukasz84
Super Test Room
FavoritesCollection by Firehawk9000
The EscapeCollection by TheRActivator
All my escape maps will be here!
Nathans chambersCollection by Ghillie Monster
Cool natenate suff
Pro Patria PortalsCollection by TwentyFiveAlpha
My favorite homebrew Portal maps.
favouritesCollection by tim
portal :)Collection by SUPERSTAR
To My ChallangeCollection by iTz_Gain
This have 3 Maps. -To Easy Challange -To Normal Challange -To Hard Challande Have Fun.
CollectionCollection by talkeeper
misaCollection by mr mouse
Long MapsCollection by Kepler
A collection of my own maps that are long. Usually they are not too hard, but they require steady focus and will keep you that way for a good long while...
The OmnitestsCollection by Ungentlemanly Conduct
A series of maps that contain a number of smaller tests for you to solve
Einfach aber schön!Collection by Auftragskiller
Locker gelöst, fast zu einfach.
fartzCollection by you monster
The Double-ChambersCollection by ujary
A collection of a series where each level has at least 2 chambers in them.
Easy Test For New PlayersCollection by 夢野秘密子
this is for all easy test for new palyers that I made it!
Fun MapsCollection by Mister Fahrenheit
Maps i either made or downloaded (mostly downloaded)
The Bear CaveCollection by Grunndle
Chambers for special friends.
Portal 2 mapsCollection by petrozorkneo
mapsek lesznek, ahogy az időm engedi :D
Apature Reboot: Chapter 2, The RebootCollection by Twan!
Apature Reboot, Chapter 1: Testing Again?Collection by Twan!
The Way of IzanamiCollection by Daniizz
Izanami is a never ending cycle what absolutly confuses peoples brain, but hopefully you have your friend here so together you can break the never ending cycle, but we promise that it won't be easy!
Conversion funCollection by ĐĖĄĎМĂŊ <<AD>>