Like the first Gelocity, this coop map is a race track again: Use your portal gun cleverly to trick your opponent and be the first to reach the finish line! But this time it's a little more dynamic: You can use your ping tool to trigger traps which can sto...

A coop map made for the 2011 summer mapping initiative. https://www.thinking.withportals.com/ Have fun people!...

Well, you might have played Gelocity 1 or 2. So you will know what this is about: This is NOT a puzzle, it's a race track covered with orange speed goo. You have to run, jump and portal your way through the course and - like in Gelocity Stage 2 - you can s...

This coop map is rather a race track than a puzzle. Use your portal gun cleverly to trick your opponent and be the first to reach the finish line! You will probably need a few laps until you know all tricks - so give it a second try! Please note that this ...

Part 1 of the series of cooperative testing spheres. http://gtm.steamproxy.vip/workshop/filedetails/?id=89736336...

My second coop map: half made in Alien Swarm SDK, other in P2AT. Have fun!...

'Bridge Building' created by DrFauli - 3 large rooms; difficulty increases with each room - design based on chapter 3 of the coop-campaign : Q: Does the solution to one of the puzzles include 'fast reflexes', dying or ninja skills? A: No! You don't need ni...

Abandoned Chambers COOP: Part 1 of 5 With everyone testing in other dimensions and GlaDOS occupied with her new little killers, Atlas and P-body were getting pretty bored so with nothing better to do they decided to wander off into the unknown and ended up...

Hello Test Subjects, It Appears it is that time again to release another hidden map we found while doing cleaning work in the deep parts of Aperture. This newly discovered area is different from previous areas, it has various puzzles that are in the easy -...

You and your partner must venture through the huge and never-ending lands of TES-CO. 2013.09.14: Updated, new checkpoint added... The TesCO-OP map collection: http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=178497744...

Save 100 Black Kittens have fun and comment...

Roses are red. Violets are blue. Glados wants you dead. What could you do? Dear test subjects, today is your big day! Robot love is not wrong! Can you and your partner prove this to GLaDOS? Today you should grab your favorite co-op partner and explore the ...

This map was originally made in PTI Ace Ryder, if you liked the puzzle, consider visiting POINT BLANK <COOP> and leaving some love there as well. I chose to remake the map in hammer to see what I could do with it in the Art Therapy style, and to get some p...

After finding themselves at the mercy of GLaDOS once again, Atlas and P-Body must make their way through the bedraggled Aperture Science Labs. In classic "Push me Pull you" form, one bot must reach the end of each puzzle to then bring the other bot along....