Ninja Kiwi's Peak Flash Tower Defense
Bloons Tower Defense 4, developed by Ninja Kiwi, was the entry in the BTD series that cemented it as one of the defining tower defense games of the Flash era. You place monkey towers along a path and must pop every bloon that attempts to reach the exit — red bloons at first, escalating through orange, pink, black, white, lead, zebra, rainbow, and the dreaded MOAB-class. Each tower has two upgrade paths that dramatically alter its behavior, creating deep strategic decisions about how to allocate your earnings.
How to Play
Drag towers from the buy panel onto valid terrain next to the track. Towers attack automatically. Between rounds, use bananas (earned by popping bloons) to buy new towers or upgrade existing ones. Each tower has Path 1 and Path 2 upgrades — both can be pursued, but they specialize differently. Click a placed tower to see its range, sell it, or purchase upgrades.
Strategic Tips
- Dart Monkey is cost-efficient early, but upgrade to Bomb Tower quickly for grouped bloons in the mid-game.
- Black bloons are immune to explosions and lead bloons are immune to darts — always have at least one tower that covers each weakness.
- Curved sections of track are the best placement spots — towers with large range can cover longer sections of the path from these positions.
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