Play Frontline Defense Online Game. One of many Strategy Games to play online on your web browser for free at KBH Games. Tagged as Defense Games, Frontline Games, Strategy Games, and Tower Defense Games. Upvoted by 18 players. Other games you might like are Space Tower Defense 2 and Zombie Parade Defense 2. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.