Gold Hit: Viva Las Robot Slot by Playtech

Neon card royals in green, pink, and purple glow against a deep maroon grid that climbs like a staircase - four rows on the left reels, six in the middle, eight on the right. A blue robot with a smiley-face visor stands beside its own little slot machine on the left edge of the screen, the whole scene set against a Las Vegas sunset skyline with "CASINO" and "HOTEL" marquees flanking the reels. The expanding layout creates 36,864 ways across six reels, and the height difference between the short left columns and the towering right ones means most of your symbol density - and most of your coin landing spots - skews toward reels 5 and 6.

Coin symbols carrying fixed cash values drop onto any reel during base play and lock in place for a minimum of three spins. Fill every position on a single reel with coins and you collect all the prizes shown on that reel at once. Some coins are diamonds instead of cash - those award one of four jackpots (Grand at 500x, Major at 200x, Minor at 50x, Mini at 20x) when collected. On shorter reels you only need four coins to complete a column. On the tall right-side reels, eight. That height imbalance shapes the whole risk profile of the coin collection mechanic.

Three or more of the robot Bonus symbols trigger free games - 10 for three, scaling up to 20 for six. The free spins round adds a wheel to the coin collection. Fill a reel with coins during free games and instead of just paying out the face values, a multiplier wheel spins and applies up to 10x to every prize on that reel. Extra free games can retrigger during the round.

The robot itself isn't just decoration. It intervenes during play by adding coins to reels, dropping oversized Giant Coins that cover multiple positions at once, or forcing an immediate collection on a reel before you've filled it completely. That forced collection is the only way to cash out a partially filled column without waiting for more coins to land naturally.