Obsession is a game in which players build a deck of Victorian gentry (British social upper class), renovate their estate by acquiring building tiles from a centralized builders' market, and manipulate an extensive service staff of butlers, housekeepers, underbutlers, maids, valets, and footmen utilizing a novel worker placement mechanic. Successfully hosting prestigious social activities such as Fox Hunts, Music Recitals, Billiards, Political Debates, and Grand Balls increases a player's wealth, reputation, and connections among the elite.
Throughout the game, a competitive courtship for the hand of the most eligible young gentleman and lady in the county presents specific renovation and reputation objectives. The player who best meets these objectives while accumulating victory points will win the hand of the wealthy love interest and the game.