Darwin's Game

Schoolboy Kaname Sudou receives an invitation from a classmate to play the mobile game Darwin's Game. When Kaname opens the app, a snake erupts from his display and bites his neck, causing him to lose consciousness. He wakes up in the hospital room and realizes that he doesn't have a bite mark on his neck. On the way home, he reflects on his experience and dismisses the surreal experience as a hallucination.

Curiosity overcomes him on the train and he opens the app again. However, since this seems like any other fighting game, he breathes a sigh of relief and decides to start his first match. His initial relief is short-lived, however, as his in-game opponent unexpectedly appears right in front of him and tries to chase him with a knife. As he desperately runs for his life, Kaname puts two and two together and has to admit that Darwin's Game is no ordinary game, but a brutal struggle for survival.

"Darwin's Game" has nice fight scenes, but that's about all I can think of from the anime.

The characters are completely flat across the board and the main protagonist has a thick layer of "plot armor" It's ok, but clearly more could have been made of it.