3 Energy Diamonds

3 Energy Diamonds: Hold & Win by Octoplay is a five-reel, three-row slot with five paylines, low volatility and a stated RTP of 95.74%. Its three Energy Diamonds—Increase, Collect and Expand—are charged by corresponding Special Coin symbols, which may trigger Hold & Win; their effects apply during the feature. The game lists a maximum win of 5,200 times the stake.

Special Coins can trigger Hold & Win, which begins with three free spins. Golden Coins, Special Coins and Jackpot symbols lock in place when they land, resetting the spins; the round ends when no new symbols can fit. Collect gathers eligible cash prizes, Increase raises their values, and Expand adds up to two rows. Five jackpots are available, including a Grand award linked to filling the expanded reels.

Use the demo version near this review to explore the slot’s mechanics and practice before playing for real money. Golden Coin prizes are collected during Hold & Win, while the Wild substitutes for regular symbols but not coin or jackpot symbols.