Frogs
The Game: Long before Frogger and Frog Bog, there were simply Frogs, the original arcade amphibians. One or two frogs hop along a lily pad at the bottom of the screen, scoping out tasty flies to eat. When you’ve got a morsel in your frog’s reach, jump and try to activate your frog’s tongue at just the right time. (You’ll know if you’ve snared a meal because your frog will seem to ascend the screen in heavenly bliss.) Whoever has the most points at the end of the timed game is the supreme frog. (Gremlin, 1978)
Memories: Though the game concept would be more widely popularized by Frog Bog several years later on the Intellivision, this is where the two-frogs-catching-flies game began. If you’re wowed by the amazing graphics on this early game, don’t be – the colorful background was a piece of artwork set into the arcade cabinet, onto which the game’s graphics were “projected” by laying the monitor flat on its back and reflecting the computer-generated graphics of the frogs and flies toward the player via a mirror at a 45-degree angle. (The game’s graphics were actually generated and shown backward, so the mirror reflection would show letters and numbers properly.) [read more]
The Game: An elaborate game of tag, only the simian players have an advantage; human players, when tagged, must be “un-tagged” by the other player to return to the game. (Magnavox, 1980)
The Game: An oversized gorilla kidnaps Mario’s girlfriend and hauls her up to the top of a building which is presumably under construction. You are Mario, dodging Donkey Kong’s never-ending hail of rolling barrels and “foxfires” in your attempt to climb to the top of the building and topple Donkey Kong. You can actually do this a number of times, and then the game begins again with the aforementioned girlfriend in captivity once more. (Nintendo, 1981)
The Game: You are a frog. Your task is simple: hop across a busy highway, dodging cars and trucks, until you get the to the edge of a river, where you must keep yourself from drowning by crossing safely to your grotto at the top of the screen by leaping across the backs of turtles and logs. But watch out for snakes and alligators! 
The Game: An oversized gorilla kidnaps the girlfriend of an unidentified plumber and hauls her up to the top of a building. You are that plumber who shall remain nameless, dodging 
The Game: Help Mr. F. Lea get to the top in this dog-eat-dog world. Cross a treacherous yard full of lawn-mowers (and helpfully slow-moving dogs), swing from tail to tail until you’ve jumped on every dog on the screen, scale the big dog’s back and jump over his spots, and climb to the top of Dog Hollow while avoiding the dog toys and bones being thrown at you from the top of the screen. You’d better be itching to win. (Pacific Novelty, 1982) 
The Game: You’re a thief trying to make away with all the loot buried in a complex maze of interconnected mines and shafts, and you’d get away with it if it weren’t for some pesky cops who are hot on your trail. You can drop bags of money on them from a level above, or temporarily brain them with a pick, and they’ll occasionally also bumble into open mine shafts of their own accord. In any of these events, they vanish for a little while to recover before reappearing. But any of these things will do you in too! (Stern/Seeburg [under license from Valadon Automation], 1982)
The Game: Mario, in his second-ever videogame appearance, has Donkey Kong in captivity, and it’s up to Donkey Kong Jr. to rescue his dad by scaling vines and chains, avoiding nasty-toothed traps and pesky birds, and reaching the key to free the great ape from Mario’s clutches. (Nintendo, 1982)
The Game: You are the king of the jungle! Swinging from vine to vine! Swimming through crocodile-infested waters! Jumping and ducking huge rolling boulders! And vanquishing spear-weilding natives to rescue the damsel! (Taito, 1982)
The Game: As a mama marsupial trying to save your baby from many malignant marauding monkeys, you go on a rescue mission that involves climbing through many, many levels of the monkeys’ treehouse village, punching primates, dodging airborne apples, grabbing various fruit items along the way (considering the abundance of apples, strawberries, cherries and bananas, one can only assume these are Pac-Man’s table leavings), and avoiding the big, purple boxing-glove-stealing ape. (Atari [under license from Sun], 1982)