The Portal Series is a popular video game franchise developed by Valve Corporation. It features a unique gameplay mechanic that allows players to create portals on flat surfaces, enabling them to solve puzzles and navigate through various test chambers. The games are known for their clever level design, humor, and the iconic character GLaDOS, an artificial intelligence that guides and challenges players throughout their journey. In the series, players take on the role of Chell, a test subject who must escape from the mysterious Aperture Science facility. The combination of mind-bending puzzles and a captivating storyline has made the Portal Series a beloved title among gamers, earning critical acclaim and a dedicated fanbase.