Play Down the Mountain Online Game. One of many Reaction time Games to play online on your web browser for free at KBH Games. Down the Mountain is made using Unity technology. Tagged as Arcade Games, Avoid Games, Reaction Time Games, and Skill Games. Down the Mountain Game App is also available for your iPhone and iPad on the Apple App Store. Upvoted by 12 players. Other games you might like are Moon Mountain and Mountain Bike Rally. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.