Computer games have evolved from simple early titles like PacMan to more visually advanced games. One of the earliest computer games was SpaceWar!, created in 1961. The most popular computer game worldwide is World of Warcraft, a massively multiplayer online role-playing game (MMORPG). There are many genres of computer games including adventure, construction/management simulation, life simulation, vehicle simulation, MMORPGs, first-person shooters, strategy, and sports. Free computer games can be found on websites like armor games and crazy monkey games.