Space Horror Slot by Onlyplay

Only 5 paylines on a 5x3 grid. That's the starting point, and it means every spin is binary - either a line hits or nothing happens. The base game symbols are chunky sci-fi objects: blue mechanical fighters, red alien ships with organic ridges, and a yellow mech suit, all rendered in saturated neon against an alien ship interior where a massive creature looms in the darkness behind the reels. Purples, deep blues, and hot neon oranges dominate the palette.

The entire bonus structure runs on planet-shaped symbols. Land a bonus symbol on all five reels and you trigger the Hold & Win round with 3 respins. Each new bonus resets the counter back to 3. The planets themselves carry coin values, but the one to watch is the Power Bonus - it only appears on reel 2, sticks for the duration, and adds a multiplier between x1 and x15 to whatever you've collected. Three jackpot tiers are built into the round: the Grand at 1,000x is a fiery orange planet, the Major at 150x is pink-purple, and the Mini at 25x is a striped red-brown sphere. The left side of the grid during regular play shows running jackpot values updating in real time, which is a nice touch.

No buy bonus, no free spins, no ante bet. Space Horror puts everything into one feature and leaves it at that. The Hold & Win trigger requires coverage across all five reels simultaneously, which on 5 paylines doesn't happen often. When it does land, the Power Bonus multiplier on reel 2 is what separates a flat round from a meaningful payout. Onlyplay reused the same engine from their Lucky Borscht family here, identical math and mechanics under a darker skin.