Portal Revolution - is a fan-made mod for Portal 2 that takes players back to a decaying Aperture facility before the events of the original sequel. In this unique prequel, you assume the role of a test subject awakened by a personality sphere named Stirling, embarking on a quest to find a powerful device that could restore Aperture to its former glory. The mod introduces over 40 new puzzles that build upon and reimagine familiar game mechanics, including resurrected elements like the Pneumatic Diversity Vent and a new laser cube variant. One of the standout features is the inclusion of more than 15 puzzles that rely solely on the blue Portal-Gun, alongside innovative challenges utilizing a Gel Cleansing Field.