Möbius

This time travel game has been compared to many other such games, including ones before it (like Sorceror's and Spellbreaker's puzzles) and those after it (such as Fifteen Minutes). It works, and it is simpler than many, but the story is a bit weak.

You are a member of the Galactic Marines investigating a lab. The rest of the review is in spoilers, though it doesn't give away more than the first ten or twenty turns.

(Spoiler - click to show)You soon find yourself stuck in a time loop, where a critical event sends you back in time every few turns. You see the previous version of yourself, performing your last set of actions. You have to figure out how to stop the explosions, and how to interact with you doppleganger, and the interactions can occur in strange ways.

I recommend it, but not for everyone. Mostly those who enjoy puzzles.