Developer 
Lines Mystery Heist is a 5x4 slot from BGaming with 243 ways to win, medium-high volatility, and an RTP of 97.12%. The game uses a heist theme built around moonlit galleries, vaults, and security systems, with stake options from 0.20 to 130.00. A demo version is available for players who want to play for free and practice before playing for real money.
The slot centres on Sticky Mystery Prizes that can remain on the reels, with multipliers reaching up to x20. Special prizes are also included, with the top prize listed at x500. Players can trigger Free Spins or Super Free Spins by landing 3 or 4 scatter symbols, while the bonus structure is designed around locked prizes that can stay in place across 10 rounds.
According to the game details, Mystery Heist also includes a Buy Bonus feature that gives direct access to Free Spins, Super Free Spins, or a mystery option. The maximum win is shown as x2,000 of the stake, and the title is presented as a mobile-friendly slot with a certified RNG system for fair play.
