Snow Bros. is a 1990 platform video game developed and published by Toaplan for Japanese arcades; it was distributed by Romstar in North America and Europe. Players control snowman twins Nick and Tom as they travel through 50 stages, using snowballs as weapons while navigating obstacles and battling monsters in order to rescue the princesses Puripuri and Puchipuchi. The game was later ported to multiple platforms, each one by different third-party developers and featuring several changes or additions. Versions for various microcomputers were in development, but were never officially released.

Snow Bros. was met with mostly positive reception from critics and players alike, earning an award from Gamest magazine and gaining a cult following since its initial release. In 1994, a sequel titled Snow Bros. 2: With New Elves was released by Hanafram, serving as the last game by Toaplan prior to their closure. The rights to Snow Bros. are currently owned by Tatsujin, a Japanese company formed by Masahiro Yuge. A modernized version of the game, titled Snow Bros Special, was developed by CRT Games and published by Daewon Media Game Lab and Clear River Games for Nintendo Switch, and was released in May 2022. A third installment in the series, Snow Bros. Wonderland, was released in 2024.

Snow Bros. is a platform game reminiscent of Bubble Bobble and Tumblepop, where players assume the role of snowmen twins Nick (wearing blue overalls) and Tom (wearing red overalls) through 50 increasingly difficult stages, each with a boss at every tenth stage that must be fought before progressing any further, in an effort to rescue twin princesses Puripuri and Puchipuchi from captivity as the main objective. The plot summary of Snow Bros. varies between each region and version. In the NES port, King Scorch cursed princes Nick and Tom by turning them into snowmen, while he also captured the princess twins Teri and Tina, leading the brothers to defeat the king to save their land.

Each player can throw snow at enemies until each one is completely covered and turns into a snowball, but partially covered enemies in snow cannot move until they shake it off. Once an enemy has been turned into a snowball, players can roll or throw the snowball, which will rebound off of walls until eventually shattering against a wall. Any enemies the snowball rolls into are eliminated and other stationary snowballs start rolling when the rolling snowball touches them. If players manage to take out all enemies by kicking one snowball (this one snowball may be used to make others bounce around as well and increase the chances to pull this trick off), bonus money will fall from the sky. If the player takes too much time to complete a level, an evil pumpkin head will come and try to kill the players. It is invincible but can be stunned and sent to appear elsewhere in the level with snowballs or snow shots. The evil pumpkin head will eventually spawn ghosts that travel freely through the level and seek the player character. These ghosts cannot be killed or stunned and players must avoid them while killing the rest of the enemies.

When players bowl an enemy over, it may drop a potion item. The color of said potions lets players know what power-up it is: the red potion increases speed, blue increases the amount of snow thrown to cover enemies in snow easier, yellow increases the distance that snow can be thrown, while green causes the snowmen to inflate like a balloon while having the ability to fly around the screen and knock out enemies for a limited period of time. The game hosts a number of hidden bonus secrets to be found, which are crucial for reaching high-scores to obtain extra lives. If a single player is downed, their character is immediately respawned at the location they start at on every stage. Getting hit by enemy fire will result in losing a life, as well as a penalty of decreasing the characters' firepower and speed to his original state and once all lives are lost, the game is over unless the players insert more credits into the arcade machine to continue playing.

Snow Bros. for the Amiga was created by Ocean France, the French division of publisher Ocean Software that previously worked on other conversions such as Pang and Rainbow Islands: The Story of Bubble Bobble 2, with Marc Djan managing its development. Ocean Software acquired the license after the European Computer Entertainment Show in September 1990 while work on the port immediately began as soon as programmer Pierre Adane finished his task of converting Pang.

Despite receiving almost no support from Toaplan, the team at Ocean France wanted the Amiga port of Snow Bros. to be as close as possible to the arcade original, playing the coin-op machine from start to finish while using it as reference when taking notes about certain elements such as animations, graphic techniques and enemy AI. Work on the conversion was primarily done on Amiga and Atari ST-based systems, while custom software was written to animate sprites and build stages as a jigsaw puzzle using low memory, which allowed an easier coding process to implement every element from the arcade version like hidden bonus secrets. Artists Philippe and Lionel Dessoly, as well as Francis Fournier adapted the arcade artwork for the conversion, using a ST set-up for maps and sprites, while Pierre Loriaux was responsible for sound design.

The crew also included new additions such as cutscenes between stages, and Adane was also able to replicate the original gameplay speed, though alterations had to be made to make the game more playable. Adane said that co-op play was removed in order to maintain a stable frame rate during gameplay, which was deemed by Djan as "probably the most important factor".