Geist/Silicon Valley, but good. Open world and multiplayer. You start as a harmless, invisible ghost who's losing 1HP per second, and you must posses someone or something to stop this slow HP loss. What and who you posses defines your strategy. Possessing a bear makes you strong, but slow and easy to find. A mouse is weak but compact, stealthy and may hide in holes in the wall or the sewers. Possessing a soldier gives you cool weapons, but these are rare and constantly attacked by enemy soldier NPCs. Possessing a cashier gives you a lot of initial cash, but a weak weapon like a cutter or whatever you buy at the supermarket. A janitor gets a broom or mop. A teacher gets a school supplies. Archer, police officer, heavy machinery operator, archeologists... each gets its own contextual weapons and abilities (same with animals). You win the battle royale when you eliminate all other ghosts.