came out at about the same time as Darwin when GS first made it available all those years ago. premise was the same: earthling transplanted to alien world to survive, but the clincher was he was the star/player/contestant in an alien entertainment show along with others and other aliens
cmsix had a whole bunch of stories where transplanted earthlings were stars in reality shows for aliens, although I can't remember any where other aliens were also "performing".
Times of Old
by Ernest Bywater
A man is killed by religious militants while protecting his fellow workers. He unexpectedly wakes up to find he's been abducted by aliens and they have an offer for him. He accepts the offer to be placed in an environment like Earth was 35,000 to 40,000 years ago, complete with animals and humans of that time. But there's a catch, it's a one-way trip and he's a star in their version of a reality broadcast show. They supply some gear to help him survive, and now it's up to him to do so.
