Bloons TD Battles
BTD Battles is not currently playable, but you can grab the mobile version for free here: https://ninjakiwi.com/Games/Mobile/Bloons-TD-Battles-Mobile.html
Play the original BTD Battles web! It's monkey vs monkey! Go head to head with other players in a battle for victory. Bloons TD Battles includes unique new tracks, designed specially for multiplayer combat. Watch the action unfold as you and your opponent battle each other's bloons side by side. What will you do? Hunker down for the long game - or go for the quick win with a rush of fast Bloons? The choice of strategy is yours. Jump into a game of Bloons TD Battles now!