Build apartment houses, rent them to tenants, and collect the rent. Sounds simple, but in Landlord every card gives you two options for play: one side is an apartment, the other has tenants, roofs (gotta have those when you build), cellars, renovations, and special actions. Move the wealthy tenants to your apartments and put the deadbeats in your opponents'. You can even bomb apartments, but don't get caught: jail awaits those who are careless!