Hotline by NetEnt is a five-reel, three-row slot with 30 fixed win lines and a 1980s crime-and-city theme. The game uses regular payline wins from left to right, with themed symbols including a glamorous woman, an armed man, a man in sunglasses, a crown, and jewellery icons. The RTP is listed at 96.13%, rising to 97.04% when all three Hotlines are active.
The main feature is the optional Hotline Bonus Bet, which can be used to activate one, two, or three horizontal Hotlines across the reels. When a wild lands on an active Hotline, it expands to cover the full reel and locks in place before a re-spin. This mechanic can continue to add more expanding wilds during the same sequence, while wilds substitute for regular symbols but not scatters.
Three scatter symbols trigger seven free spins, and the expanding wild feature remains active during the bonus round. In the demo version, players can play for free and practice before playing for real money, making it easier to see how the re-spins, free spins, and Hotline Bonus Bet work in the base game.