Escape From 100 Million B.C.

In Escape from 100 Million B.C., players take part in an ill-fated time expedition that gets stranded 100 million years in the past with their time machine perched precariously atop an active volcano. Due to their violent crash landing, most of their equipment and vital parts of the time machine have been scattered across the dinosaur-infested valley that they find themselves in. Worse, as they explore and interfere with the past, they find that they are destabilizing the time stream, causing people and things to be pulled from other time periods into the valley as well. If this continues, it can cause a chain reaction ending with the volcano erupting as a sort of temporal release valve to protect the universe from further damage.

In game terms, the players have to explore the map, trying to recover the time machine pieces and their equipment while trying not to kill any of the dinosaurs (which causes paradox). Once they retrieve enough time machine parts, they can time jaunt back to the future, but they have to be careful what sort of gear they leave in the past or they might cause even more paradox, snatching defeat from the jaws of victory at the last second!