• Developer: Valve
• Publisher: Valve
• Release Date: 18 Apr, 2011
• Players: 1-4

Portal 2 is an adventure and puzzle game developed by Valve using Source Engine (also known as Portal Engine), released in 2011. This sequel introduces several changes compared to its previous version. For instance, the story is more extensive and includes new characters such as Wheatley and Cave Johnson. Players can also utilize new tools like the gel surfaces, speed-boosting elements, and shields. Overall, the game is celebrated not only for its engaging storyline, sci-fi atmosphere, and challenging puzzles but also for its popular multiplayer mode.