Bloons TD 6 is a strategy game about building a defense against waves of invading Bloons. Players combine Monkey Towers and Heroes, choosing from distinct tower upgrades and activated abilities to shape a response to each map. Its appeal lies in fitting those tools together: a broad roster gives players different ways to strengthen a defense rather than relying on a single unit.
The strategic toolkit includes 25 Monkey Towers, each with three upgrade paths, alongside 17 Heroes with signature upgrades and special abilities. Players can also pursue Paragon upgrades, use more than 100 Monkey Knowledge meta-upgrades, and earn Powers and Insta Monkeys through play, events, and achievements. Beyond standard map-based play, Boss Events test defenses against Boss Bloons, while Odysseys link maps through shared themes, rules, and rewards. Quests add narrative context about the Monkeys, and the Content Browser lets players make and share Challenges and Odysseys.
Play formats range from offline single-player to co-op for up to four players, with public and private games available. Contested Territory adds a team competition over tiles on a shared map, while the Content Browser supports player-made activities.