Theres a game that if you havent seen on steam yet, you might not have steam at all, but its called Player Unknowns Battlegrounds (PUBG) and it is a realistic survival of the fittest shooter, you scavenge the map for loot and try to kill but not be killed, there is a play area that gets smaller every few minutes to keep the players in a more compact area as the game goes on, eventually it comes down to 2 or 3 people, sometimes more, in a tiny area and all withing an easy shooting distance, and it is very addictive, I really suggest getting it!
EDIT: theres also 100 people per game, so its pretty huge, making the map huge as well.