Frogger

The objective of the game is to guide a frog to each of the empty homes at the top of the screen. The game starts with three, five, or seven frogs, depending on the machine's settings. Losing all frogs results in a game over . The player uses the four-direction joystick to hop the frog once.

Frogger is either single-player or two players alternating turns. The frog starts at the bottom of the screen, which contains a horizontal road occupied by speeding vehicles such as race cars, dune buggies, trucks, and bulldozers. The player must guide the frog between opposing lanes of traffic to avoid becoming roadkill and losing a life. After crossing the road, a median strip separates the two major parts of the screen.

The upper half consists of a river with logs, alligators, and turtles, all moving horizontally across the screen in opposite directions. By jumping on swiftly moving logs and the backs of alligators and turtles, the player can guide the frog to safety. The player must avoid snakes, otters, and the open mouths of alligators. A brightly colored female frog is sometimes on a log and may be carried for bonus points.

The very top of the screen contains five "frog homes", and at least one is always open and available. These sometimes contain bonus insects or deadly alligators. When all five frogs are in their homes, the game progresses to the next level with increased difficulty. After five levels, the difficulty briefly eases and yet again progressively increases after each level.

The timer gives 30 seconds to guide each frog into one of the homes, and resets back to 60 ticks whenever a life is lost or a frog reaches home safely. " There are many different ways to lose a life (illustrated by a skull and crossbones symbol where the frog was), including being run over by a road vehicle; jumping into the river; running into snakes, otters, or an alligator's jaws; sinking while on top of a diving turtle; riding a log, alligator, or turtle off the side of the screen; jumping into a home already occupied by a frog or alligator; jumping into the side of a home or the bush; or running out of time. The opening tune is the first verse of a Japanese children's song called "Inu no Omawarisan" ("The Dog Policeman"). Other Japanese tunes include the themes to the anime series Hana no Ko Lunlun and Rascal the Raccoon .

The American release has the same opening song plus " Yankee Doodle ". Scoring Forward steps score ten points, and every frog arriving safely home scores 50. Ten points are awarded per each unused ½ second of time. Guiding a lady frog home or eating a fly scores 200 each, and when all five frogs reach home to end the level the player earns 1,000 points.

A single bonus frog is given at 20,000 points, while 99,990 points is the maximum high score that can be achieved on an original arcade cabinet . Players may exceed this score, but the game "rolls over" and only keeps the last five digits.