Play Defender Idle 2 Online Game. One of many Defense Games to play online on your web browser for free at KBH Games. Defender Idle 2 is made using Unity technology. Tagged as Defense Games, Idle Games, Incremental Games, and Upgrades Games. Upvoted by 15 players. Other games you might like are Mech Defender and Idle Mine: Remix. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.