Frogger is an arcade game introduced in 1981. The game is regarded as a classic and was noted for its novel gameplay and theme. Frogger is still popular and versions can be found on many Internet game sites. The object of the game is to direct frogs to their homes one by one. To do this, each frog must avoid cars while crossing a busy road and navigate a river full of hazards. The skillful player may obtain many bonuses along the way. The player starts with three frogs (lives). The player guides a frog which starts at the bottom of the screen. The lower half of the screen contains a road with motor vehicles, which in various versions include cars, trucks, buses, taxis, bicyclists, and/or motorcycles, speeding along it horizontally. The upper half of the screen consists of a river with logs, alligators, and turtles, all moving horizontally across the screen. The very top of the screen contains five "frog homes" which are the goals for each frog. Every level is timed; the player must act quickly to finish each level before the time expires.