The original "Highway Crossing Frog" was actually an exact copy of an earlier game called "Freeway", developed in 1971 at the University of Washington psychology department on an IMLAC PDS-1 graphics minicomputer, as the "reward" part of a project related to studies of human short-term memory using this early graphics computer workstation. Apparently, someone at Konami saw it and commercialized it.
Frogger is regarded as one of the "Top 10 Videogames" of all time by the Killer List of Videogames (KLOV).
Game Play
The object of the game is to guide 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 bonuses along the way.
The only control the player has is navigating the direction for the frog to hop with the joystick. Each push in a direction causes the frog to hop once in that direction. On the bottom half of the screen, the player must successfully guide the frog between opposing lanes of trucks, cars and other vehicles, to avoid becoming roadkill.The middle of the screen, after the road, contains a median where the player must prepare to navigate the river.
By jumping on swiftly moving logs and the backs of turtles, the player can guide his frog safely to one of the empty lily pads. The player must avoid alligators, snakes and otters in the river, but may catch bugs or escort a lady frog for bonuses. When all five frogs are directed home, the game progresses to the next, harder level.





