ravenfield
ravenfield is a very good singleplayer FPS game in where the Ravens (Red Team) and Eagles (Blue Team) fight in a selection of maps. Also, the game is made in Unity and Blender.
Person: Hey, have you heard of ravenfield?
Other Person: You mean that one singleplayer FPS?
Person: Yeah, that game.
Other Person: You mean that one singleplayer FPS?
Person: Yeah, that game.