Kingdom Rush Frontiers is a free-to-play tower defense game developed by IRONHIDE IRELAND LIMITED, available on iPhone. It is a sequel to the award-winning game Kingdom Rush, which promises to take the gameplay experience to a whole new level.

The game is set in exotic lands where players need to defend themselves against dragons, man-eating plants, and ghastly denizens of the underworld. The game offers over 18 tower abilities and eight specialized tower upgrades to choose from, including Death Riders, pestilence clouds, and assassins that steal and kill your enemies. You can also train legendary heroes with unique specialties that fit different play styles and strategies.

With over 40 enemies and merciless boss fights, the game offers a challenging and action-packed experience. The game has classic, iron, and heroic game modes to challenge your tactical skills, and three difficulty modes for those who want a real challenge. The game also offers hours of gameplay with over 80 achievements, an in-game encyclopedia to learn about your enemies, and min/max your towers towards your preferred strategy.

Overall, Kingdom Rush Frontiers is an excellent tower defense game with exciting features and challenging gameplay that will keep you hooked for hours.