"Steam's Top-Rated Game Portal 2 Expands with Free Prequel and Upcoming Mod"

Portal 2, the top-rated game on Steam, is getting a free eight-hour prequel campaign called Portal: Revolution. Developed by a small team of dedicated fans, the mod takes place before the events of Portal 2 and features new characters and 40 new puzzles. The campaign is fully voiced and will be released on January 5, 2024, requiring players to own a copy of Portal 2 to play.