|(Demos) While other Match-3 games support only one gameplay mode (Swap or Chain), Lost in Reefs 2 goes a step further by now including Group, a third, new gameplay mode. Swap pieces between spots, trace a â€œchainâ€ between identical pieces, or â€“ now â€“ explode groups of similar colors. And to complete a level, destroy the marble plaques. Itâ€™s harder than it sounds! Another game exclusive is the shape of the playing field: Lost in Reefs 2 offers a traditional rectangular field as well as an innovative six-sided one for a greater challenge.