《Impossible Bosses》 is a boss-rush action RPG that supports solo play and online co-op for up to 8 players. Players choose a character class, enter combat stages, level up, collect items, and defeat powerful bosses with unique attack patterns. Players can choose from five classes: Fighter, Mage, Archer, Monk, and Necromancer. Each class has a different combat style, allowing players to take different roles in battle and create different team compositions. The game is built around staged battles against multiple bosses. Players must avoid dangerous boss attacks, manage skill timing, position themselves carefully, and work together with teammates to survive each encounter. Through combat, players can grow their characters and prepare for the next boss fight. The level-up system and item farming system allow players to take on increasingly difficult combat situations.