Loading Ad...
Before the later sequels, Bloons TD 4 set the formula: monkeys with darts, a winding track and an endless stream of balloons that refuse to stop.
Pick a track, then spend your starting money on towers placed along the bloon path. Every bloon you pop earns more cash for new towers and upgrades. Bloons split into weaker layers when hit, so a strong defense needs both damage and coverage. Survive every round to clear the track.
Bloons TD 4 plays straight from the browser with no download required, making it an easy unblocked pick for a free period at school. Load up a track and start popping.