GameZebo's featured web game of the week is DropSum, one of the entries in the "Become a Rock Star Flash Games" contest sponsored by Gaia Online and Mochi Games. The goal is to drop numbered discs into a grid to create rows or columns. It's similar to Chain Factor - another great web game - but the twist is that in order to make the discs disappear, the row or column has to add up to a certain number. For example, if the given sum is 9, you could match 3 + 3 + 3, or 4 + 3 + 1 + 1, and so on.
DropSum has three game modes: Basic, Timed, and Arcade. Each mode has the daily, weekly, monthly and all-time leaderboards of the 20 best players from around the world. Click on the source or alternative link below to play DropSum.