Ninja Star Slot by RealTime Gaming

The Ninja Scroll bonus is what keeps this one interesting. Land three Ninja Star logos on a line left to right and the round drops to a screen of four pairs of scrolls with a hooded ninja standing among them. Pick one scroll from a pair and the ninja unrolls it to show either a cash prize, a Next Level arrow that pushes you up to a higher-value tier, or Feature Over - which ends the round on the spot. Clear enough scrolls without hitting the stop card and you climb through three escalating prize levels, each one paying bigger than the last. No safety net, no free backup pick. One Feature Over card cuts the run dead and you collect whatever you've banked to that point.

The free spins work separately and on a different trigger entirely. Three or more of the red 忍 disc scatters anywhere on the grid open 8 spins with every win tripled, and landing three more scatters inside the round adds another 8 on top. Both bonus paths can stack inside the same session but they don't interact - the Ninja on the scroll pick doesn't appear during free spins, and the 3x multiplier doesn't bleed into the scroll prizes. It's two distinct features sharing one cabinet, which was RTG's house style in this era.

The masked ninja icon works as the wild across the 25 paylines and substitutes for everything except that red scatter disc. It tends to stack two or three high on the middle reel, and a full stack through the centre column with premium symbols either side is what gets close to the 10,000-coin top line payout. Two progressive jackpot meters run along the top corners - Minor and Major - and both drop randomly regardless of whether the spin won. Live values during testing sat near $407 and $1,324, though those figures climb across the operator network and reset on each hit.

Visually it's restrained for the theme. A moonlit navy sky with a thin crescent moon and scattered stars sits behind the reels, a single tiered pagoda roof silhouetted in the middle distance, weathered stone castle walls flanking the grid on both sides. The reels themselves are a bright cyan panel ringed by a faint mandala sunburst. Card royals from 9 through Ace are hand-drawn in Japanese calligraphy style using red, blue, green, yellow and purple inks - the most distinctive part of the art. Premiums cover a sheathed samurai katana, a golden kabuto helmet with red hachimaki cloth, a tiered wooden pagoda and the masked ninja wild. The 忍 kanji on the scatter literally translates to ninja or endurance, which is a nice touch most players never read. No buy bonus, no ante bet, no free-spin shortcut - this is 2013 mechanics, and the only way into either feature is to hit the symbols on a spin. If the Edo-era Japanese register grabs you, RTG's Shogun Princess Quest runs a later take on the same theme with more modern features bolted in.