About Portal: Forever Testing

Portal: Forever Testing Is a Fan-created Modification for Valve Software's Portal 2, containing various custom-built levels for the game. Initially started in 2019 as a small map pack for Portal 2, Portal: Forever Testing was separated into a stand-alone mod for the game after many iterations, reaching its "Probably Final" update in 2022.

"One of my favorite Portal 2 Mods"
- Cooperation Conundrum on YouTube (pinned comment on his play through)

"Great job on the Cave lines, very believably Cave Johnson kind of quotes. :)"
- Ngeruma on YouTube (in response to my "thanks for playing" comment on a version of one map)

About The Definitive Edition

Forever Testing: Definitive Edition is the final iteration of Portal:Forever Testing, and includes several improvements and additions:

• The maps from the mod "Lost Between Floors", which itself originated as Forever Testing's first iteration and initial concept. Play the original, but new!
• An additional brand-new map exclusive to Forever Testing: Definitive Edition

• Several improvements to story, gameplay, and visuals in the original four maps

  • Remastered Voice lines where possible
  • Unintentional skips and puzzle confusion fixed where possible
  • Better scenery
  • etc.

Important Note:

This is a mod for Portal 2; as such, it requires a legitimate copy of Portal 2 on steam to install and play.

To install, Download the mod and extract the folder to:

C:\program files\Steam\SteamApps\sourcemods\

AI Content Disclaimer: 

All character voices in this mod were acted by me as input for an AI (RVC) to make them sound like the performances of Stephan Merchant, JK Simmons, and Ellen McLain as their respective characters. This was done because a suitable voice actor for each character could not be located, and for character authenticity.

All other content has been created by hand without the use of Generative AI.