Portal was the first Valve-developed game to be added to the OS X-compatible list of games available on the launch of the Steam client for Mac on May 12, 2010, supporting Steam Play, in which players that had bought the game either on a Macintosh or Windows computer could also play it on the alternate system.
1 Eurasian Pleistocene megafauna became extinct in roughly same time period despite having a much longer time to adapt to hunting pressure by humans. 2  However, the extinction of the Eurasian megafauna can be viewed as a result of a different process than that of the American megafauna.
Some species of animals, such as the dino â¦ saurs, are still being argued over by scientists on how the became extinct. But, a few years ago, An animal that was thought to be extinct was caught off of a Japanese ocean! It as the goblin shark.It was supposed to have died out millions of years ago, but its alive.ome prehistoric species that have become extinct due to human actions are the Dodo, they all lived on one island, and humans used them for lamp oil and new animals like dogs and cats were introduced. We're not sure if the mammoth died because of humans.