What is it? Time Trials is a turn-based single-player game where you use time travel to fight and make your way through a lab under siege by an alien threat. While the rules are simple, Time Trials enforces paradox free time travel, which means players cannot take any action that would change an observed event in the future. Features 16 levels of increasing difficulty. Two separate endings. Preview system to assist with time travel. A novel approach to time travel in video games.