
This hack replaces the game’s levels with new custom designed levels built using the game’s existing assets. The tutorial, Jungle Jam and boss levels have not been edited. In addition to the custom levels, this hack also includes: - Character selection screen in adventure mode: unlocked after completing adventure mode (or by using the password 00011000). - The tutorial and intro can now be skipped by holding select when starting adventure mode.

Mario Bobble is a rom hack of Bubble Bobble for the Famicom Disk System.

Platform / Puzzle / Strategy / Action / Erotic
Miss Bubble II is an adult bootleg/hack of "Bubble Bobble". It features 100 single screen levels with photographic semi-nude images for backgrounds. The background changes every three levels. The player takes on the role of one of two yellow and green colored mice. Armed only with the ability to blow bubbles and jump, the objective is to trap and kill all of your enemies within the bubbles to advance to the next stage. The bubbles can also be used as temporary platforms, to help the mice reach previously inaccessible areas of a level. If a player is touched by an enemy then the player dies. Any trapped enemies who are not killed quickly enough will turn red and escape their bubble prison. These angry enemies are much faster than before, making them harder to kill. Enemies also become angry if players are taking too long to complete a level. Defeated enemies are turned into bonus fruit items that can be collected for points. On many levels, special bubbles appear such as water filled bubbles appear. These can be burst by players to release their contents and destroy enemies. The water bubble releases a torrent of water that will quickly flow down the platforms to the bottom of the screen. Any enemies caught in the flow are killed. Bubbles containing letters also appear. The aim is to collect the letters needed to spell the word along the side of the screen. Once the player loses all of his lives the game is over. Upon continuing, all remaining enemies return to their un-angered forms.

Platform / Puzzle / Strategy / Action / Fantasy
The “Bubble Bobble: Lost Cave” Project aims to create a new experience for every lover of the classic Bubble Bobble arcade game, designed by Fukio “MTJ” Mitsuji and crew back in 1986. The aim is to provide the original Bubble Bobble coin-op with a whole hundred of different levels. Gameplay-wise, the game is going to retain all the mechanics of the original, but Bubblun and Bobblun will have to face a 100 challenging new stages.

A Christmas themed Super Mario Bros. mod

Donkey Kong II was developed by Nintendo R&D1 and released as part of the Game & Watch Multi Screen series, featuring two LCD screens. It was released in 1983. Donkey Kong Jr. has to touch a key, then it moves up to the top screen. Donkey Kong Jr. has to climb to the top screen while avoiding things such as electrical wires. When he gets to the top screen, Donkey Kong Jr. will have to touch the key again, and it will move to the keyhole of one of the chains. Donkey Kong Jr has to climb up the rope below the keyhole, while avoiding birds. When he gets to the top of the rope, one of the chains will unlock. He has to do this 4 times until he saves Donkey Kong. After that, the game will start over, at a somewhat faster pace.

The Atari 2600 port of the hit arcade Donkey Kong differs from the original version in gameplay and has two stages instead of the original four.

Donkey Kong has kidnapped Pauline, and it is up to Mario, the fearless carpenter, to come to her rescue. Throwing fate to the wind, Mario tries desperately to climb the labyrinth of structural beams from the top of which Donkey Kong taunts him. Help our hero ascend the metal structure by dodging an assortment of fireballs, steel beams, and exploding barrels the angry ape hurls at him. Prepare yourself for a never-ending adventure as Donkey Kong takes Pauline away to the next level every time Mario gets to the top. Based on the arcade game of the same name, this classic will keep hardcore and casual gamers entertained for hours. This Donkey Kong port differs from the arcade game, having only three stages instead of four.

Platform / Sport / Arcade / Action
Donkey Kong Hockey is one of the few two-player Game & Watch games ever manufactured. It was released as a part of the Micro Vs. series. Donkey Kong and Mario must engage each other in a two-player game of ice hockey. The game is colorless, being set up on a small LCD screen. The console is an elliptical shape, while the controllers are small and circular; the console can open up to store the controllers.