Play Ancient Planet Online Game. One of many Strategy Games to play online on your web browser for free at KBH Games. Tagged as Defend Games, Strategy Games, and Tower Defense Games. Ancient Planet Game App is also available for your iPhone and iPad on the Apple App Store. Upvoted by 20 players. Other games you might like are Ancient Beast and Ancient Mahjong. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.