Mods / Grating

• TTransferby MeviousPut your faith in light.242.2k downloadsupdated 15 y ago
• TThe Order of Things 03 (Coop)by Invocare_Ignisi hope you have fun199.8k downloadsupdated 11 y ago
• HHakuna Matata 3by DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back if you enjoyed playing my maps, think about supporting me:191.2k downloadsupdated 12 y ago
• TThe Order of Things 08 (Coop)by Invocare_Ignisi hope you have fun, if you find any exploits or have suggestions leave comments -invocareignis178.6k downloadsupdated 11 y ago
• CChainbuilderby Nortisop029Congratulations! It's time for you to test our new Rube Goldberg machine! Some assembly required. Batteries not included. Check out my other test chambers here: Oct. 13 update: Some modifications to remove a recently discovered exploit.176.3k downloadsupdated 14 y ago
• CCubes of Destinyby DonyelBe sure to make use of the 'tab' function in which you can see what your partner sees. Keep in mind in cooperative chambers you must employ two sets of portals. Teamwork and communication is key to completing any cooperative test chamber.147.8k downloadsupdated 14 y ago
• EExpendable Human Launch Vehicleby ceski"This is the longest and largest custom map I've played. None of the challenges were too taxing but they were all logical and interesting. What impressed me most is how the player's path twists through the space so you keep getting close to the exit (or entrance) and then moving away again." - wh...121.0k downloadsupdated 11 y ago
• PPatienceby MeviousCoordination is key. Unfortunately there's only one of you.115.4k downloadsupdated 14 y ago
• TThe Order of Things 04 (Coop)by Invocare_Ignisif you have suggestions leave comments. Have Fun -InvocareIgnis115.0k downloadsupdated 9 y ago
• IInterior Crocodile Alligatorby Dr. WormI drive a Chevrolet movie theatre.112.2k downloadsupdated 13 y ago
• TThis is Teamwork 5by DrFauliThe entire map-series has been reworked and updated on 29. June 2017 [7 maps] This map uses a funnel and blue gel to create some awesome teamwork. estimated difficulty: easy/medium Don't worry if you lose your portals or die by accident: You only have to solve each room once and then you can reac...110.4k downloadsupdated 9 y ago
• TThe Order of Things 01 (Coop)by Invocare_Ignismy first coop map. i hope it is challenging enough. if you have suggestions leave comments. Have Fun -InvocareIgnis109.4k downloadsupdated 11 y ago
• HHeightby MeviousApply blue gel thoroughly. Pray that you aren't part of the control group.108.4k downloadsupdated 14 y ago
• HHakuna Matata 5by DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back Let me know what you think about this map. It is my personal favorite in this map-series. if you enjoyed playing...98.0k downloadsupdated 12 y ago
• RRendezvousby MeviousAdvanced funnels and their application to not-letting-you-through-stuff94.8k downloadsupdated 13 y ago
• PPreservationby MeviousConserve your energy.87.7k downloadsupdated 14 y ago
• PPyrron_Coop.029 : Barad Durby PyrronUne dangereuse montée jusqu'au globe oculaire le plus enflammé du Medieval Fantasy. A dangereous climp to the most inflamed occulus rift of the Medieval Fantasy.85.5k downloadsupdated 12 y ago
• FForgotten Elementby ValdengrinЭтот тест содержит кое-что.83.5k downloadsupdated 10 y ago
• DDuo Puzzle #3by kbkMy third two-player puzzle. This one is a bit trickier then the others!78.9k downloadsupdated 12 y ago
• TThis is Teamwork 3by DrFauliThe entire map-series has been reworked and updated on 29. June 2017 [7 maps] This map uses a funnel and speed gel to create some awesome teamwork. estimated difficulty: easy/medium Don't worry if you lose your portals or die by accident: You only have to solve each room once and then you can rea...75.8k downloadsupdated 9 y ago
• TThis is Teamwork 4by DrFauliThe entire map-series has been reworked and updated on 29. June 2017 [7 maps] This map uses a funnel and the edgeless safety cube to create some awesome teamwork. estimated difficulty: easy/medium Don't worry if you lose your portals or die by accident: You only have to solve each room once and t...75.3k downloadsupdated 9 y ago
• TThe Art of Cooperation IIby daveyvandyYou must not cooperate.73.4k downloadsupdated 13 y ago
• EExcellent Partnership 3 - Back and Forthby wildgoosespeederNot a light bridge puzzle this time. Fixed finnicky-ness.73.4k downloadsupdated 12 y ago
• PPOINT BLANK <COOP>by n/aCheck out the refurbished version too66.9k downloadsupdated 13 y ago
• TThis is Teamwork 1by DrFauliThe entire map-series has been reworked and updated on 29. June 2017 [7 maps] This map uses a funnel and blue gel to create some awesome teamwork. estimated difficulty: easy/medium Don't worry if you lose your portals or die by accident: You only have to solve each room once and then you can reac...64.8k downloadsupdated 9 y ago
• Mmdm 002by DrFaulimedium difficulty coop map; 002 if you enjoyed playing my maps, think about supporting me:63.8k downloadsupdated 13 y ago
• FFriendship is magic 14by LazyCoal62.5k downloadsupdated 13 y ago
• FFrancks_ COOP Sessions #13 - Going Aroundby Francks_Teamwork to go - literally - around the room No deaths are necessary62.3k downloadsupdated 6 y ago
• HHakuna Matata 2by DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back if you enjoyed playing my maps, think about supporting me:62.1k downloadsupdated 12 y ago
• TThe Order of Things 06 (Coop)by Invocare_Ignishave fun, if you have suggestions or you find anything out of order or buggy please leave a comment -invocareignis61.4k downloadsupdated 11 y ago
• TThe Order of Things 05 (Coop)by Invocare_IgnisHave Fun, If you find any exploits or bugs leave comments. Suggestions are always welcome -InvocareIgnis59.9k downloadsupdated 11 y ago
• TThis is Teamwork 6by DrFauliThe entire map-series has been reworked and updated on 29. June 2017 [7 maps] This map uses both funnels and the edgeless safety cube to create some awesome teamwork. The 2nd room features a companion cube shuffle puzzle. estimated difficulty: medium Don't worry if you lose your portals or die by...59.7k downloadsupdated 9 y ago
• FFriendship is magic 13by LazyCoal59.4k downloadsupdated 13 y ago
• TThe Order of Things 12 (Coop)by Invocare_IgnisHave Fun, if you find any kind of bugs or exploits please leave a comment58.6k downloadsupdated 11 y ago
• TThe Climbby oheyitsmattOne large room split into four levels. Find your way from the bottom to the top. My first published Test Chamber - I hope you enjoy! *Edited to eliminate an oversight that allowed the user to skip a portion of the puzzle. Thanks to iSmile02 for the help here!58.0k downloadsupdated 10 y ago
• TThe Order of Things 09 (Coop)by Invocare_IgnisWhile i personaly dont like goo maps or any maps who require tons of goo i thought id give it a try and stick with the theme. this is the result. if you find any bugs/exploits leave comments. suggestions are welcome as well i hope you have fun -InvocareIgnis55.6k downloadsupdated 11 y ago
• HHakuna Matataby DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium/hard - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back if you enjoyed playing my maps, think about supporting me:55.3k downloadsupdated 12 y ago
• TThe Order of Things 02 (Coop)by Invocare_Ignisif you have suggestions leave a comment have fun -InvocareIgnis52.9k downloadsupdated 11 y ago
• HHakuna Matata 6by DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back if you enjoyed playing my maps, think about supporting me:52.0k downloadsupdated 12 y ago
• TThe Order of Things 14 (Coop)by Invocare_IgnisAhoi lads, 13 and 14 are out now, sadly i had to cut this map down a bit (too many items to publish) which suxxx, nontheless i hope you enjoy this map. if you encounter any bugs, exploits or have any other suggestions feel free to leave a comment. greets -Invocare_Ignis48.4k downloadsupdated 11 y ago
• TTimeTOdie 60 - Up and down (Advanced Series)by TimeTOdieWelcome to my 60th chamber and my sixth special chamber. Every tenth chamber of my TimeTOdie series is a special chamber. It is an avanced chamber. Check out the four puzzles and find a way out.48.2k downloadsupdated 12 y ago
• TThe Order of Things 07 (Coop)by Invocare_IgnisHave Fun, If you have suggestions or find some kind of exploit or bug please leave comment -InvocareIgnis46.6k downloadsupdated 9 y ago
• 11960by SpectroThree main test chambers with multi-step solutions. If you liked this test, try the revised edition!46.0k downloadsupdated 14 y ago
• FFriendship is magic 19by LazyCoal44.5k downloadsupdated 14 y ago
• HHakuna Matata 4by DrFauliHakuna Matata - "no worries"; - estimated difficulty: medium - no ninja skills needed - you do not have to die to solve this map - if you lose your portals, it is easy to get them back Information: - The Sphere Cannon was created by me (DrFauli). - The SteamUser TeamSpen210 has edited and improve...44.4k downloadsupdated 12 y ago
• TThe Order of Things 10 (Coop)by Invocare_IgnisAfter quite some time i finally got to rework this map. as always: if you find any bugs or exploits feel free to leave comments. suggestions are always welcome as well hope you have fun -InvocareIgnis44.2k downloadsupdated 11 y ago
• IImprobable 1by bluemonkey43.7k downloadsupdated 7 y ago
• PPortal is the best (cooperative no. 10 )by Robo SK.43.5k downloadsupdated 11 y ago

1.5k grating mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.