Time traveling adventure using Philip J. Reed's vsM engine. From the publisher's website:
Project Alexandria provides rules, statistics, and suggestions for people who want to role-play time travelers in our planet’s past.
Paul Simons had no idea why ZeiTech needed a cargo plane pilot, but the money was insanely good. His wife joked that maybe ZeiTech knew the world would end before they ever had to pay him. They had a good laugh over that one at breakfast. He was glad he’d eaten since there didn’t seem to be any coffee or pastries in the dim auditorium. Everyone in the room seemed to be nervous about something. This didn’t seem anything like the flashy pamphlets and commercials that ZeiTech was known for.
After a little bit, a man Paul recognized as the CEO of the company slowly walked onto the stage. Dr. Zeit looked older than his magazine photos, and his sweater seemed tattered. The feedback seemed to startle Dr. Zeit when he picked up the microphone. "We made a terrible mistake. I broke the universe, and now I desperately need you to help me fix it." Paul had an odd feeling he’d heard this plea before.
We now know after some problematic initial exploration that creating these scabs makes time travel more difficult. Each paradox eventually becomes a speed bump to time travel. We refer to this as a paradox quotient. We now believe if the volume of paradox gets too high, time travel will become impossible, thus removing the way to fix the paradoxes.
Because of this, we need to now send groups back to the point of our earliest exploration, about 4 billion years ago, and move forward, fixing any major paradoxes we inadvertently created. Some of our teams left living things in the wrong eras, left broken time machines for others to discover, and changed major events. Hopefully, these lost teams had a chance to upload their notes into temporal black boxes. These black boxes are unaffected by causality problems and should give your team hints as to how to repair the timeline. Good luck unraveling all of this." - Dr. Zeit