188 ratings
The Penrose Collection features an ever expanding series of maps with a focus on the Surface Division Field. That fancy invention is a new testing element the lab boys at Aperture Science South developed to conjure mid-air portals that allow two-way access to the other side.

The tests will start off plain simple, with an introduction to the Surface Division Field. But with a smooth learning curve future tests will become less and less easy.

So far only the first three maps are done, but I'm working on the fourth. I hope you enjoy the test course, but also the design of the maps. Feel free to give feedback on the maps in the workshop or, even better, on every maps' corresponding thread over at ThinkingWithPortals.com
Items (3)
Penrose 01: Introductory Science
Created by Fourth Reaper
Testing focus: Surface Division Fields
Difficulty: Easy
Expected play time: Not that long
Version: 1.2

20.000+ Total Unique Subscribers on the map! Thank you to everyone who played it! :D

This first map is extremely easy, it's really just an intr...
Penrose 02: Room Dislocation Association
Created by Fourth Reaper
Testing focus: Surface Division Fields
Difficulty: Easy / easy-medium
Expected play time: Not that long
Version: 1.2

Please do not start playing here, play Penrose 01 first for a better understanding of the concept.

This second map is not that di...
Penrose 03: Tidal Displacement
Created by Fourth Reaper
Testing focus: Surface Division Fields
Difficulty: Easy-medium
Expected play time: Not that long
Version: 1.0

To amplify your testing experience, do not start playing here, play Penrose 01 and 02 first for a better understanding of the concept.

In 1 collection by Fourth Reaper
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Singh Mar 15 @ 12:12am 
Great map series. Played and enjoyed all of them. Well balanced difficulty across each map as well.

My newest: Mouse Eats Cat </3

My hardest: Major Lazer - Will Melt Your Brain
Eddie Feb 16 @ 6:22am 
Nice idea, but buggy as hell. You can get stuck very easily.
Niall Erdeni Jan 25 @ 4:19pm 
Interesting concept! Kinda made my brain hurt at the third test there though. I'm still not entirely sure what I did to solve it. I just fiddled around pressing buttons and stuff and somehow ended up with the second cube (seriously I have no idea what I did to get it), then I had more of an idea of what I was doing. But I'm chalking it up to dumb luck haha. Not that it's a bad thing at all that I was confused. It means you created a really creative new element that required me to think a bit differently. Kind of like when I first played Portal altogether!
Halo Jan 24 @ 10:45pm 
Make moreeeee :) Pweaz
Fourth Reaper  [author] Jun 24, 2013 @ 2:39pm 
teTris: Cool. :) Again, I'll notify you when I have some more time.
Cadeη: Heh, well, I'm still kinda' buissy with college right now, so that's why I don't really have time for making maps anymore. Which was pretty much my only reason to go on steam. Right now it turns out I also have to be online for a moment for college, but yeah. :P Normally I can't always be here.
tetTris Jun 22, 2013 @ 6:46pm 
credit shall be in the things i make, you can count on it
Ciirulean Jun 22, 2013 @ 4:23pm 
Reaper... why are you never online?
Fourth Reaper  [author] Jun 22, 2013 @ 7:13am 
Then I'll get back to you one that when I have the time. Right now I'm just checking in to respon to messages, that's pretty much all the time I have.

I'm definitely in favor of your idea though, as long as I get credited for it. Then again, my logo is on it, so.. Yeah.
tetTris Jun 21, 2013 @ 7:19pm 
ok its just i do a lot of portal 2 model ports to gmod and after playing this amazing set of test i wanted to see if i could get the reskined cubes and stuff into gmod
Fourth Reaper  [author] Jun 21, 2013 @ 6:24pm 
Thanks for the feedback people, and expecially the videos. :D

Selyp, that was really funny for me to watch. :P Not in a bad way of course. I would like to mention that you kinda' solved the third one by getting stuck, hence the emergency wall break there. But really nice overall, great to actually also hear someone's thought process. Thanks! ;)

PS: If you still don't fully grasp what happened there, it's important to note that the Surface Division Fields work from both ends. In the third test four rooms were actually interconnected with one field. Hard to wrap your head around, I know. What especially hit me was when you said you can't even imagine how someone would create a puzzle like that. I take that as a compliment. :)