Mods / Custom Story

• 112 Angry Tests: Part 2by CaretCaretI have now released a new level called 9 Lives, try it out! Part 2: Lasers Are a Girl’s Best Friend About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of t...774.7k downloadsupdated 14 y ago
• 112 Angry Tests: Part 3by CaretCaretI have now released a new level called 9 Lives, try it out! Part 3: Don’t Eat the Paint About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the single pl...748.7k downloadsupdated 14 y ago
• 112 Angry Tests: Part 7by CaretCaretI have now released a new level called 9 Lives, try it out! Part 7: Revenge of the Turret About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the single...716.4k downloadsupdated 14 y ago
• 112 Angry Tests: Part 5by CaretCaretI have now released a new level called 9 Lives, try it out! Part 5: You Put the Fun in Funnel About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the sin...707.6k downloadsupdated 14 y ago
• 112 Angry Tests: Part 4by CaretCaretI have now released a new level called 9 Lives, try it out! Part 4: A Bridge Too Far About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the single playe...706.4k downloadsupdated 14 y ago
• 112 Angry Tests: Part 6by CaretCaretI have now released a new level called 9 Lives, try it out! Part 6: A House Divided About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the single player...704.3k downloadsupdated 14 y ago
• 112 Angry Tests: Part 1by CaretCaretI have now released a new level called 9 Lives, try it out! Part 1: Once Upon a Time… About the map pack: This map pack consists of six maps with two puzzles per map and one intro map. Every map has a different theme and puzzle element. I have tried to keep the difficulty level of the single play...688.1k downloadsupdated 14 y ago
• GGelocity Stage 3by RadixWell, 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 stop your opponent by using the ping tool...450.5k downloadsupdated 14 y ago
• GGelocityby RadixThis 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 map is really large. That is why it takes...377.7k downloadsupdated 14 y ago
• GGelocity Stage 2by RadixLike 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 stop your opponent. Please note that this ma...377.1k downloadsupdated 14 y ago
• DDesigned for Danger Part 3by PuddyPart 3 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.331.5k downloadsupdated 14 y ago
• DDesigned for Danger Part 5by PuddyPart 5 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.319.4k downloadsupdated 14 y ago
• DDesigned for Danger Part 6by PuddyPart 6 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.318.1k downloadsupdated 14 y ago
• DDesigned for Danger Part 8by PuddyPart 8 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.306.4k downloadsupdated 14 y ago
• DDesigned for Danger Part 7by PuddyPart 7 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.303.3k downloadsupdated 14 y ago
• DDesigned for Danger Part 4by PuddyPart 4 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.294.9k downloadsupdated 14 y ago
• DDesigned for Danger Part 1by PuddyPart 1 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.276.8k downloadsupdated 14 y ago
• DDesigned for Danger Part 2by PuddyPart 2 / 8 To preserve Designed for Dangers pacing and storyline it is recommended that you play the maps in order. The collection can be found here: More information can be found at www.designedfordanger.com ! NOTE: You may need to set Shader Detail to high to avoid strange/weird reflections.274.3k downloadsupdated 14 y ago
• UUNREAL CHAMBER 02by annaThis map was made in the Hammer world editor. Here's how it works. If you want to learn hammer, start here. maybe. who knows. given infinite time, anything is bound to happen. in any case, valve time. Follow my Steam workshop to not miss new maps, if I do decide to make more. Thank you! ♥ Thanks...234.3k downloadsupdated 9 y ago
• TTricky Tripleby LateLJThis coop map consists of 3 testing chambers and features different kind of testing elements. It is not very long map though and maybe not all that tricky, but I hope you enjoy it nonetheless! :D229.3k downloadsupdated 14 y ago
• MMinecraft in Portal 2 (Part 1: Escape)by TimoteeeiBeware of creeper!.... SSSSsssss....BOOOM! ================================== WARNING! THE VIDEO IS WALKTHROUGH! ================================== Hint: You can use an axe like in the original Minecraft game ;) Tags: minecraft creeper awsome hammer outdoor Actually this map is my first one what...226.3k downloadsupdated 14 y ago
• MMinecraft in Portal 2 (Part 2: The Mine)by TimoteeeiAh! Skeleton! ================================== for download press the subscribe button --^ ================================== + Craft system (Yeah, yeah, i know the workbech is kinda wierd and bit buggy but it is works) ///////////////////////////////////////////////////////////////////////////...218.6k downloadsupdated 14 y ago
• GGelocity Time Trial - Track 1by RadixA slightly modified single player version of Gelocity 1 race map. This time you don't have to compete against your friend but you have to fight against the clock. Use your skills to reach the finish line as fast as you can! You will probably need a few laps until you know all tricks - so give it...206.1k downloadsupdated 14 y ago
• DDecay - Part 1by BanjaxePart 2: Part 3: Or get the collection above. Challenge: Complete the last chamber using only 3 cubes. Major Spoilers Below! If you get stuck QubaHQ has put a great walkthrough on youtube:175.8k downloadsupdated 15 y ago
• EEnigma Protocol | Chapter 1by Night MelonSet shortly after the events of the Cooperative Testing Initiative, a test subject wakes to GLaDOS' newest testing track. Make your way through 22 brand new test chambers in this map pack. Chamber 02 inspired by Stratos' Prolongued Exposure168.6k downloadsupdated 6 y ago
• MMinecraft in Portal 2 (Part 3: The Nether)by TimoteeeiLava, Ghast and Zombie Pigman There are at least 7 secrets! Try to find them all! Including: Herobrine, Steve and Cake :3 Thanks every one for testing, especially to -pg- Jagster285 =) ====================================== FAQ ۝ How can I play/download/install it? Press the Subscribe button, it'...163.8k downloadsupdated 14 y ago
• UUNREAL CHAMBER 03by annaThis map was made in the Hammer world editor. Here's how it works. If you want to learn hammer, start here. maybe. who knows. given infinite time, anything is bound to happen. in any case, valve time. Follow my Steam workshop to not miss new maps, if I do decide to make more. Tips in case you're...160.6k downloadsupdated 9 y ago
• GGelocity Time Trial - Track 2by RadixA Singleplayer version of Gelocity Stage 2 but with a couple of changes. This map is not a puzzle but a race track covered with orange speed gel. Like in the first Gelocity Time Trial your task is to reach the finish line in a limited time. You will probably need a few laps until you know all tri...158.0k downloadsupdated 13 y ago
• UUNREAL CHAMBER 04by annaThis map was made in the Hammer world editor. Here's how it works. If you want to learn hammer, start here. maybe. who knows. given infinite time, anything is bound to happen. in any case, valve time. Follow my Steam workshop to not miss new maps, if I do decide to make more.150.6k downloadsupdated 9 y ago
• NNo money for chambers 1by DaMaGepyWant to know what happens when Aperture runs out of money and can't afford to build huge underground testchambers anymore? This map series takes place on a parallel earth, where they use abandoned mines digsites and outdoor areas for controlled testing... to be more cost-efficient. No more space-...150.3k downloadsupdated 13 y ago
• MMinecraft in Portal 2 (Part 4: The Village)by TimoteeeiPiggy, Villager and Cake :3 After the Nether you came to the strange Village. Where are the almost all villagers? What for this strange eye shaped things need? And why the hell this butcher needs your portalgun? Explore and have fun :3 There are 4 secret rooms and some easter eggs ;) Thanks every...142.8k downloadsupdated 14 y ago
• DDecay - Part 3by BanjaxeDon't Start Here! Play Parts 1 and 2 first: Part 1: Part 2: Or get the collection above. Major Spoilers Below! If you get stuck QubaHQ has put a great walkthrough on youtube:135.9k downloadsupdated 14 y ago
• UUNREAL CHAMBER 01by annaThis map was made in the Hammer world editor. Here's how it works. If you want to learn hammer, start here. maybe. who knows. given infinite time, anything is bound to happen. in any case, valve time. Follow my Steam workshop to not miss new maps, if I do decide to make more.127.1k downloadsupdated 9 y ago
• CCubiby AmnDragonCubi is a brainy portal experience designed for players who have played through Portal 2. These 3 chambers are cerebral in nature, providing a challenge that the average Portal player will enjoy while still providing fresh puzzles for the more skilled player.117.9k downloadsupdated 15 y ago
• AAperture Valentineby MeviousRoses 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 depths of the aperture science computer a...116.0k downloadsupdated 14 y ago
• MMoonbase Luna-C 01: Intro to Lunar Gravityby CatsySomewhere in the Multiverse, in another Aperture not too different from ours, an intern working on the Conversion Gel project had a stroke of inspiration: if moon rock is such a great portal conductor, why not open a portal on the Moon and get it ourselves instead of buying it at exorbitant price...112.8k downloadsupdated 14 y ago
• MMoonbase Luna-C 03: One Small Stepby CatsyHello, and again: welcome to the Aperture Science Volunteer Employee Gravity Liberation Testing Program. Congratulations on completing the absurdly easy mandatory acclimation tests--you will now begin proceeding through the standard testing track. By this point you should have gained a tolerably...112.7k downloadsupdated 14 y ago
• MMoonbase Luna-C 02: Featherfallby CatsySomewhere in the Multiverse, in another Aperture not too different from ours, an intern working on the Conversion Gel project had a stroke of inspiration: if moon rock is such a great portal conductor, why not open a portal on the Moon and get it ourselves instead of buying it at exorbitant price...108.5k downloadsupdated 14 y ago
• DDecay - Part 2by BanjaxeDon't Start Here! Play Part 1 first. Part 1: Part 3: Or get the collection above. Major Spoilers Below! If you get stuck QubaHQ has put a great walkthrough on youtube:104.8k downloadsupdated 14 y ago
• GGelocity Time Trial - Track 3by RadixFinally - a Singleplayer version of Gelocity Stage 3! This map is not a puzzle but a race track covered with orange speed gel. Like in Gelocity Time Trial - Track 1 and Track 2 your task is to reach the finish line in a limited time. You will probably need a few laps until you know all tricks - s...103.9k downloadsupdated 12 y ago
• MMinecraft in Portal 2 (Part 5: The End)by TimoteeeiDragon and endermans. DON'T STARE AT THEM! I warned you! There are some Secrets and different ways to kill the Dragon, try to find them all ;) Thanks every one for testing, especially to users of and early betatesters Psychomaster - , DoctorOrange - , OfficialTSG - . =============================...100.1k downloadsupdated 12 y ago
• EElectrophobia (Part 1)by MeviousPart 1 of the series of cooperative testing spheres.94.6k downloadsupdated 14 y ago
• EEnigma Protocol | Chapter 2by Night MelonSet shortly after the events of the Cooperative Testing Initiative, a test subject wakes to GLaDOS' newest testing track. Make your way through 22 brand new test chambers in this map pack.91.4k downloadsupdated 6 y ago
• EElectrophobia (Part 2)by MeviousPart 2 of the series of cooperative testing spheres.89.6k downloadsupdated 14 y ago
• TTimetravel conceptby DaMaGepyIt's just a showcase map, NO real PUZZLES! I've tested a new concept, made a simple room to test it, and then detailed it. I also added an optional "objective" to find a way out to the surface (grab the portalgun and go). The outdoor scene is ment for a few second peek, thats why you can't run ou...89.5k downloadsupdated 15 y ago
• CCurious Chamber 2by Nobi-KnobiPlease subscribe to my Collection "Curious Chamber", so you can play through from the first map till the end ;) Link:88.3k downloadsupdated 15 y ago
• EEnigma Protocol | Chapter 3by Night MelonSet shortly after the events of the Cooperative Testing Initiative, a test subject wakes to GLaDOS' newest testing track. Make your way through 22 brand new test chambers in this map pack. Chamber 09 inspired by Ben77's Reflection85.4k downloadsupdated 6 y ago
• EEnigma Protocol | Chapter 5by Night MelonSet shortly after the events of the Cooperative Testing Initiative, a test subject wakes to GLaDOS' newest testing track. Make your way through 22 brand new test chambers in this map pack.81.9k downloadsupdated 6 y ago

1.4k custom story 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.