Todd's Adventures in Slime World is a side-scrolling platform video game first released for the Atari Lynx in 1990, with Sega Genesis and PC Engine Super CD-ROM² versions following in 1992.

Todd's Adventures in Slime World is a 2D platform game, with multidirectional shooting and metroidvanie-style maps. The main character of the game is Todd the explorer, who enters Slime World to search for gems. Todd starts the game with a water pistol and computer generated map. Players in Slime World are armed with a water cannon that can be fired at many angles and can kill most enemies in one hit, cling to and climb most walls, and perform high and long jumps. Although nominally an action game, many rooms require knowledge of the player's abilities and can only be navigated in certain ways, frequently giving it an air of a puzzle game.

Todd can sustain ordinary damage from many sources, but there are invulnerability shields and pools of water that remove all damage taken when used. Red enemies, when shot, release a spray of red slime that can instantly kill even a shielded player, creating circumstances when it is best not to shoot foes.

There is also a type of enemy called a Hidden Snapper, that instantly kills players that step over it. Snappers are often undetectable until triggered, though subtle design cues hint at their location. Players (usually) have infinite lives to explore the world, but lose all their inventory items if Todd dies and are also sent back to the last checkpoint arrow passed.