Slalom, originally released as VS. Slalom, is a skiing sports video game developed by Rare and published by Nintendo for the Nintendo Entertainment System. It was first released in arcades in North America for the Nintendo VS. System in 1986, as with most Nintendo-published games of the era; it was then released for the console in North America in August 1987 and in Europe later that year. The player races in a series of downhill slalom skiing runs while navigating past flags and obstacles before time expires. It was developed by Tim and Chris Stamper and its music was composed by David Wise.

Slalom is the first NES game developed outside Japan (in this case, the United Kingdom), the Stamper brothers' first game released under the Rare brand and the first non-Japanese game to be published by Nintendo. Reviews from the 1980s found Slalom unrealistic, but largely appreciated its graphics and animations, and the original arcade version received praise for its innovative ski controls. In contrast, AllGame's retrospective review called the game poorly made and rushed. The rights to Slalom was acquired by Microsoft through their acquisition of Rare, releasing the game in their 2015 Rare Replay compilation for the Xbox One.

Slalom is a single-player game in which players race downhill in a series of slalom skiing races. There are 24 downhill runs total that are evenly spread across three mountains. Before the game starts, players choose their mountain based on difficulty: Snowy Hill for beginners, Steep Peak for intermediate players, and Mount Nasty for experts. The goal for each run is to reach the finish line within the allotted time. Players must dodge obstacles including trees, flags, snowmen, sledders, and other skiers on their way downhill, or else they will tumble and lose time. With enough momentum, players can jump over these obstacles. Players must ski around flags to maintain their speed. If they ski on the wrong side of the flag, the racer will snowplow and slow down.

Also located on the runs are moguls (bumps) that, when hit, causes the racer to go airborne and slow down slightly when landing. While airborne, players can perform freestyle tricks and earn bonus points, but if the player botches the trick, the racer may tumble and fall, losing time. At the end of each run, final scores are calculated based on the amount of time remaining on the run and points scored from completing freestyle tricks. If the player earns any points, they may race some amount of the next level "solo" (without other skiers onscreen). The points earned in qualifying runs convert to additional seconds on the solo run timer. The high scores on each of the runs are saved in memory until the console is powered off.

Slalom was developed by British video game company Rare by Tim and Chris Stamper. Rare had been looking to develop games for consoles in the wake of rampant computer game piracy in the United Kingdom. They chose the NES for its nascent popularity, though the console had no Western developers, and asked Nintendo for a license. When Nintendo declined, they reverse engineered the console and made a demo, Slalom to show the company. Nintendo was astonished at their effort, and made Rare its first Western developer, beginning a long and close collaboration between Rare and Nintendo of America founder and president Minoru Arakawa.

Slalom was originally released in 1986 in arcades as part of the Nintendo VS. System and is titled VS. Slalom. This features an upright cabinet, a joystick, one jump button, monaural sound, and standard raster graphics. An optional controller upgrade features two physical ski poles and shortened skis that the player stands on to control the skier. The NES version was released by Nintendo in North America in August 1987 and in Europe on 15 October. Slalom was Rare's first video game developed as a new company. It is the Stamper brothers' first video game console release.

The music is the first NES composing job by Rare's video game composer David Wise. In a December 2010 interview, Wise said that he found the NES sound board work challenging. He had to first code the HEX values for each note by hand before converting them into subroutines with a computer. Wise recalled thinking that his first NES projects sounded like doorbells. He was humbled that others continue to remix his tracks.

Upon its original release in arcades, VS. Slalom was reviewed by Clare Edgeley in British magazine Computer and Video Games. She praised the innovative ski controls, but said it lacked "staying power" and considered it an "above average" game without the ski controls.