Immersive Sims have a long, interesting history within the gaming industry. It's a style of game with an ardent fanbase that devours every entry that dares to follow the mythic footsteps of titles like System Shock and Deus Ex while being incredibly difficult to define. Immersive Sim, as a term, is typically referred to as a genre, but it would be more accurate to think of it as a game design ideology. For clear examples of what that ideology is, the run of releases from Arkane Studios from Dishonored to Death Loop is the quintessential ideal for ImmSim game design.
Source：https://www.cbr.com/level-design-matters-more-in-immersive-sims-than-other-genres/
