The Last Hope

You are a scientist who was working on the development of a time machine. When the experiment began, a wormhole was formed and mankind and most of wildlife disappeared. Now you are humanity's last hope because you the last man alive. Your mission is to find the time machine.

Therefore you will have to explore Russia, Germany, Norway, Egypt, U.S., Mars and the Moon. Use portals because these can teleport you to different ages from the Age of the Dinosaurs to our Era. But a problem that you will face is to survive.