Noun
minigame (plural minigames)
(video games) A small and simple game, especially an incidental game within a larger video game.
If you collect 100 coins, you get to play a balloon-popping minigame.
Some of the bosses are fought through a minigame of rock-paper-scissors where others you have to fight or crash the Sukopako "motorbike" into a pirate bear. Source: Internet
Here's are the basics of Deus Ex: Mankind Divided's hacking minigame explained. Source: Internet
Nintendo has released several mini games for the Play-Yan that can be downloaded from their website, although Nintendo later removed all minigame functionality through a firmware update. Source: Internet
Some of these will come naturally through the minigame itself, and others can be bought as DLC. Source: Internet