Beat the Beast: Mighty Sphinx is Thunderkick’s 2020 entry in their Beat the Beast series — a collection of mythology-themed slots built around a tight, high-volatility free spins format. The Mighty Sphinx instalment brings an Egyptian guardian to life with Thunderkick’s characteristically sharp visual design and an expanding wild mechanic that can genuinely transform a bonus round.

The game runs on 9 paylines with bets from $0.10 to $100 per spin. The Egyptian theme is presented with Thunderkick’s clean, slightly stylised aesthetic — the Sphinx looms over a desert backdrop, and the symbol set mixes ancient artefacts with bold card suit designs. It’s atmospheric without being busy.

The golden ankh scatter is the trigger: land enough and you’re into the Free Spins round with the Sphinx wild active throughout the entire feature. What makes this worth chasing is the expanding Sphinx wild — it can cover an entire reel when it lands, dramatically increasing win coverage. Beyond that, a progressive multiplier builds with each consecutive free game, meaning later spins in the bonus carry increasingly heavy multipliers. The combination of an expanding reel-covering wild and a climbing multiplier is where the max potential concentrates.

Thunderkick has set the RTP at 96.1%, and the volatility is very high — this is not a game that drip-feeds wins. The base game exists largely to build up to the bonus, and the bonus itself is where all the significant payouts live. The max win potential is 5,000x your stake, which is achievable when the expanding wilds and the progressive multiplier peak together during free games.

Beat the Beast: Mighty Sphinx is the right pick for players who want a focused, high-volatility Egyptian slot without layers of mechanics cluttering the experience. Land the feature, watch the Sphinx expand, and let the multiplier run.