Developer 
Lines Queen of Diamonds 20 by 1spin4win is a slot released on 17 March 2021 with 20 fixed paylines, a medium volatility profile, and a stated RTP of 97.5%. The game uses Wild and Scatter symbols to form winning combinations, while the maximum multiplier reaches x730. Bet sizes range from €0.20 to €50, with fixed stake options shown below the reels.
Players can use the demo version to play for free and practice before playing for real money. The slot includes a Start button for manual spins and an Autoplay function for continuous play. Its 5.7 hit rate suggests wins may appear at a moderate frequency, in line with the medium-volatility structure.
The title centres on the 20-payline format, which is reflected in the game name Queen of Diamonds 20. This slot is available as a browser-based game, with gameplay designed around standard reel mechanics, special symbols, and bonus-triggering features linked to the Scatter symbol.
