15 Single-Player First-Person Games You Need to Try Out

The Entropy Center

The Entropy Center is heavily inspired by Portal, and everything from its witty AI companion to general aesthetics is a strong reminder of those inspirations. But unlike Portal, The Entropy Center is all about manipulating time through the use of a titular weapon – and using that to solve puzzles and eventually reverse the destruction of Earth. The characters are charming and the puzzle designs constantly add new things to the mix, which makes for a surprisingly engaging experience from start to finish.