Grid
5x4 (plus 8 Special Reel medallions)
Spartacus Call to Arms is a 2017 Light & Wonder release (originally WMS / Scientific Games) that takes the gladiator theme and bolts a second board onto the side of the first one. The main 5×4 grid sits on a wooden plank panel inside a carved gold frame, with pitted stone columns on either side. Inside those columns are eight gold-rimmed medallions, four stacked down the left and four down the right. Those are the Special Reels, and they're the entire reason this slot exists.
Here's the mechanic, plainly. Every spin, each of the 8 medallions stops on one regular paytable symbol. The Lion Bonus never lands there, only the gladiators, masks, helmets and coin icons. Count how many medallions show the SAME symbol and that's your multiplier ladder: 2 matching pays 2x, then 3x, 5x, 10x, 25x, 50x, and a full eight-of-a-kind detonates a 250x multiplier. Multiple symbols can trigger their own multipliers on the same spin, totally independently.
And this is where the design quietly tightens the screws. The multiplier only fires if that exact symbol is part of a paying line on the main 5×4 board. So you can stare at six matching bronze helmets glowing around the frame and still walk away with nothing, because no helmet line connected across the 50 fixed paylines. It looks generous in screenshots. It plays a notch harder than it looks. Honestly, that catch is what saves the math from being silly.
The Wild is the Call to Arms shield and it substitutes for everything except the Lion. If a Wild lands inside a medallion, it jumps straight onto a random spot on the main reels (it won't overwrite an existing Wild or Bonus), which is a nice quality-of-life touch. The Lion Bonus only appears on reels 1, 3 and 5, and you need all three to open 10 Free Spins plus a 2x total-bet payout. During free spins extra Wilds seed the reels and every Special Reel multiplier doubles, so a full 8-match now pays a 500x kicker on top of the line win. Three more Lions retrigger another 10 spins.
A few honest knocks. There's no feature buy, so the Lion is your only route into free spins and that wait can drag in medium-volatility sessions. The bet ceiling caps at $50 which feels modest for an L&W premium brand like this, and the absolute win is capped at $250,000 cash rather than a clean multiplier of stake. Is the Special Reel ring still worth showing up for? Yeah, mostly. It's one of the more original mechanics WMS ever shipped, and seeing four or five medallions lock onto the same gladiator face is genuinely tense in a way most modern slots have forgotten how to be.