Portal Epic Edition

Portal Epic Edition is a Portal mod created by Epic Backflip and released in June 17, 2020 on ModDB. Self-described as "the greatest shitpost ever known to man", this mod features same test chambers by GLaDOS with exponent changes, such as adding more hazards (Rocket Turrets and Sentry Turrets) and content from Half-Life 2 (with enemies like Barnacles and Manhacks, weapons like Crowbar and the SPAS-12 shotgun). Complete with a main campaign, a bonus alternate campaign, 11 achievements, and 4 bonus challenge maps.

Conception
The idea for Portal Epic Edition was conceived when Ossy Flowol was playing Portal and asked themselves "What if I spawned rocket turrets everywhere?". First they used a command to spawn them around levels and then began decompiling portal maps and adding Rocket Turrets. Eventually a map pack was released Jun 17th, 2020. The map pack was barely functional and some levels crashed on load. Allison Ghost (aka CamBen42 aka Valla-Chan) then made a the GLaDOS boss fight as a bonus map. Konclan learned of Portal Epic Edition and decided that this wasn't far enough. Taking the map pack and turning it into a source mod. First the levels were given proper transitions and a few bonus maps were added. Konclan saw the underwhelming nature of the final level and tried to make it more difficult, though the anticlimax was an intentional decision by Ossy. Instead of scrapping the alternative final chamber, Konclan was inspired by it to remake the entire campaign but as an entirely different experience, the Cognitive Breakdown Tests. Ironically the first chamber made in CBT edition was the final one. The idea for CBT was less about spam and more about crafted painful experiences, something to keep the player guessing about what could be coming next and making them think more about how to overcome the new obstacle. CBT was mostly developed by Konclan with a few chambers made by other Epic Backflip team members. A couple more bonus maps were added and the bonus GLaDOS boss fight was worked into the main campaign as an alternate secret ending to the main campaign.

Map pack
Cognitive Breakdown Tests (or CBT) is a special map pack included with the mod for players who want a bigger challenge. It includes harder obstacles, such as a laser that disintegrates anything that touches it, blue goo that instantly kills the player, a big ball pit in Test Chamber 10, etc. This set of chambers includes everything from the main chambers, and new additions.

Achievements
Achievements are found throughout the main campaign, CBT campaign, and bonus maps. They use the bonus maps system and are unlocked through in game entities, this means you can still get the achievements even if you turn on sv_cheats 1. Below are listed some of the ways to get the achievements:
 * Second Amendment.
 * Cake?
 * Break my Stride.
 * Incinerated.
 * Free Man.
 * It's a Feature.
 * Desperate.
 * Twelve.
 * Epic Escape.
 * Impossible.
 * Impossible CBT.
 * Desperate.
 * Twelve.
 * Epic Escape.
 * Impossible.
 * Impossible CBT.
 * Epic Escape.
 * Impossible.
 * Impossible CBT.
 * Impossible CBT.
 * Impossible CBT.

Epic Secret Maps
Secret maps are unlocked by finding the main campaign's good ending.

Walkthroughs

 * Official Campaign Guide


 * Official Cognitive Breakdown Tests Guide


 * Official Bonus Maps Guide


 * Official Achievements Guide