It's a crazy mix of;

-No hand holding, punishing difficulty and boss fights of a soulslike game -Steep learning curve similar to mobas -Looting like an ARPG -Leveling and in depth systems (gear, health, etc.) comparable to RPG's -Jump scares akin to horror games -Gunplay and PvP of other FPS's taken to a whole new level -Questing along the lines of MMO's -Different ways to go about playing the game analogous to strategy games -Realism of different elements on par with simulation games -Immersion and intensity much the same of survival games -Risk and reward of gambling

Last but not least you can have the Loot Lord on top of your pile of goodies in your stash!