WarioWare, Inc.: Mega Microgames! is an action game released in 2003 for the Game Boy Advance. The game features a series of rapid-fire microgames, each lasting only a few seconds, requiring players to quickly understand and complete simple tasks. These microgames are presented in quick succession, keeping the pace fast and energetic throughout the gameplay.

The main objective is to successfully complete as many microgames as possible without failing, with each stage increasing in speed and difficulty. The unique mechanic lies in the extreme brevity of each challenge, demanding quick reflexes and rapid decision-making. Players must adapt instantly to new rules and controls as they progress.

What distinguishes WarioWare, Inc.: Mega Microgames! is its unusual idea of compressing gameplay into ultra-short segments, creating a frantic and varied experience. This format emphasizes quick thinking and fast reactions over traditional level progression or story development, making it a distinctive entry in the action genre on the Game Boy Advance.