There’s good reason Portal 2 remains the top-rated game on Steam, more than a decade after its initial release. The Valve puzzler has it all: a fantastic, memorable campaign packed with cleverly designed challenge rooms and a funny, exciting story. A full, separate co-op campaign for you and a friend to enjoy together. An expanded user creation tool set that enables players to make their own puzzle rooms. And now, thanks to a small team of dedicated fans, a complete eight-hour prequel campaign, fully voiced, and coming as a free game at the start of 2024.

MORE FROM PCGAMESN: Best old games, Best FPS games, Best co-op games