Drop Sum The basic idea is that you drop numbered orbs into a grid from above. Any time a straight group of balls adds up to 9, either horizontally or vertically, you score some points and all the orbs involved change color.
Play Drop Sum Online Game. One of many Puzzle Games to play online on your web browser for free at KBH Games. Tagged as Drop Games, Puzzle Games. Upvoted by 27 players. Other games you might like are Letter Drop: Henry Danger and Cavern Drop. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.