Some of the best tower defense games for iOS are on sale today: Kingdom Rush Frontiers & Origins from $1, more

Ironhide’s Kingdom Rush titles are easily some of the best tower defense experiences on iOS. Today three of its popular titles went on sale at notable prices starting with Kingdom Rush Frontiers for $1. Usually selling for $3, this is the lowest price we have tracked on the App Store since the last time it dropped to $1 back in December 2015. All three titles on sale today combine for a 4+ star rating from over 15,000 gamers.