Pool Rummy on DeccanRummy is a variant of Indian Rummy where players pay a fixed entry fee that forms the prize pool. The objective is to arrange 13 cards into valid sequences and/or sets. Players are eliminated when their points reach 101 or 201, depending on the variant, and the last remaining player wins the prize pool. Key elements include a competitive point system for losses, options to drop early from the game for a reduced penalty, and different scoring scenarios.