The Bloons TD series is one of the most popular and successful tower defense franchises on mobile. The latest one, Bloons TD 6, launched in 2018. It features 20 maps, tons of upgrades, 19 towers, three upgrade paths, offline support, new game modes, and more. Of course, previous iterations of the game have their charms as well and some of them still get updates. It’s nice to see companies still taking the genre seriously even years after it hit its second renaissance. Bloons TD 6 (and previous games) are solid tower defense games for reasonable prices.