Droplets

Droplets is an abstract, strategic placement, area control, chain reaction game, in which you play droplets of water onto the board. As droplets accumulate in a space, they can trigger a splash, causing all the droplets within to move outwards. These can, in turn, cause other splashes to be triggered – though not always under your control, and not always for your benefit.
Your goal is to splash your droplets onto the fountains around the board, while sending your opponents’ down the drain.

—description from the designer