A port of the 1983 ZX Spectrum classic to the original Game Boy: twelve eggs, ladders, hungry hens, and seed that stops the clock if you reach it first.
You are Hen-House Harry, and your job is eggs. Twelve of them, scattered around a single screen of platforms and ladders, with a countdown timer running the whole time. There are piles of seed lying about, too. Collect them and you get points, and the timer stops for a while. But the hens want them as well — and when a hen eats a pile, the hen pauses. So the seed is both a clock and a trap, and clearing it off the board is you doing the hens a favour they didn't ask for. Touch a hen and you lose a life. Fall through a gap in the bottom of the level and you lose a life. Ride one of the upward-moving lifts into the top of the screen and you lose a life, which is the one that catches everybody the first time. You start with five lives, and every 10,000 points buys you another.
https://github.com/Zapskii/GB-Chuckie-Egg
English draughts (checkers) for the original Game Boy — standard rules, compulsory captures and multi-jump chains, against a built-in machine opponent.
A homebrew first-person raycaster for the original Game Boy: four randomly generated maze floors, keys and doors, grunts, bats and brutes, and three save slots.
A homebrew pseudo-3D racer for the original Game Boy: three tracks, two rivals plus traffic, hills, bends you can see coming, and 27 lap records saved to the cart.
A lunar lander for the original Game Boy: bring the ship down on a pad, in one piece, without much fuel to spare. Gravity is always pulling, the engine is the only thing that beats it, and fuel is the whole clock.
Asteroids, on a screen that wraps at all four edges. Turn, burn and fire, and keep breaking the rocks down until there is nothing left to hit you
Classic 10×10 battleship for the original Game Boy: a seven-ship fleet that never touches, and three AI levels up to a HARD mode that maps your ships.
Three tracks, two rivals, traffic, hills and a road that bends towards the horizon, on a Game Boy with no 3D hardware at all. GB Racer is a proper arcade racer in a 128 KB cart.
Four random maze floors, three kinds of monster and a gun, rendered in true first person on a 1989 Game Boy. FPS Dungeon shouldn't work. It does.
We kept rebuilding the same Super Game Boy border kit for every game, so we fixed its bugs, added real tests and gave it away. Here's what's in GB-SGB-Tooling.