Steam Punk Heroes Slot Review

Provider	Microgaming

Steam Punk Heroes is a 5-reel, 25-payline video slot from Microgaming, released in 2012. It carries an RTP of 95.88% and medium volatility. The theme is Victorian steampunk - gears, pipes, airships, and a heavily armed mechanical heroine. The main attraction is the two-stage free spins trigger, where a gear-pull mechanic determines both your spin count and multiplier before the bonus round begins.

Steam Punk Heroes at a Glance

Developer: Microgaming
Released: 2012
Reels / Rows: 5 x 3
Paylines: 25 (adjustable)
RTP: 95.88%
Volatility: Medium
Bet range: £0.01 - £50 per spin
Wild: Yes - doubles all prizes in winning combinations
Free spins: Yes - up to 20 spins with up to 20x multiplier
Progressive jackpot: No

The 95.88% RTP sits below the UK industry average of around 96%. That is worth knowing before you sit down. Medium volatility means wins arrive at a reasonable pace, but the theoretical return is modest compared to Microgaming's stronger titles.

Theme and Design

The setting is an alternative Victorian Britain powered by steam rather than electricity. The reels are housed in a metallic frame surrounded by pipes, cogs, and fog. Background art shows a skyline of zeppelins and industrial towers. It is a consistent visual world - no cartoon elements, no jarring mix of styles. Everything commits to the aesthetic.

The Steamgirl is the highest-paying regular symbol, awarding 1,000 coins for five of a kind on a payline. A roaring mechanical lion follows at 750 coins for five. Flying machines and other steampunk devices fill out the mid-value range. The low-value symbols are the standard nine-to-ace playing card ranks, which feel like a missed opportunity given how well-executed the thematic symbols are.

Sound design matches the look: clanking metal, hissing steam, mechanical whirring during spins. It creates a believable atmosphere without the soundtrack becoming irritating across a longer session.

Wild Symbol

The W.I.L.D. symbol - styled in the game's metallic font - substitutes for all standard symbols except the scatter. Its key feature is that it doubles the payout of any winning combination it contributes to. Five wilds on an active payline pays 2,000 coins, which is the slot's top symbol payout. The wild cannot replace the Steam Punk Heroes scatter logo.

Steam Punked Free Spins Feature

Three or more Steam Punk Heroes scatter logos anywhere on the reels trigger the free spins feature. Before the spins start, you are taken to a second screen showing two large mechanical gears.

You pull a handle to activate the gears. The left gear stops first and reveals your multiplier - it can land anywhere between 2x and 20x. The right gear then stops to show your free spin count, which ranges from 10 to 20 spins. These values are randomised, so the same scatter trigger can produce vastly different outcomes depending on where the gears land.

The multiplier applies to all wins during the entire free spins round, not just wild-assisted wins. If you land a 20x multiplier with 20 free spins, every winning combination during those spins is multiplied by 20. Retriggering is possible - landing three or more scatters during the free spins awards additional spins using the same gear mechanic.

Five scatter symbols in the base game pays 50x your total bet on top of triggering the feature.

Paylines and Betting

The 25 paylines are adjustable, so you can reduce the number of active lines per spin. The minimum bet is £0.01 per payline, and the maximum total bet is £50 per spin. At maximum paylines and maximum coin value, the bet range gives the game accessible entry points for low-stakes players while still accommodating those who want to push the total stake higher.

Wins pay left to right only across active paylines. The paytable is accessible in-game and shows all symbol values at your current coin denomination, which makes it straightforward to see what each combination is worth before committing to a session.

Autoplay and Expert Mode

Steam Punk Heroes offers a standard spin mode and an expert mode. Expert mode unlocks autoplay up to 9,999 spins. The game also tracks session statistics including your largest win and total playing time, accessible from within the interface. These are minor additions, but the session stats are a useful reference if you are monitoring your play.

Mobile Play

The game runs on HTML5 and functions in any mobile browser. The 5x3 grid and metallic visuals translate well to smaller screens. The gear-pull animation during the bonus feature is smooth on current mobile hardware. No download is required, and the game adapts cleanly to both portrait and landscape orientations.

Steam Punk Heroes in Context

The 95.88% RTP is the main caveat with this game. It is 0.12 percentage points below the 96% figure many players use as a rough threshold. Over short sessions that difference is negligible, but over significant play volume it compounds. Players who prioritise return-to-player when selecting games will find better options in the Microgaming catalogue.

That said, the free spins mechanic is genuinely interesting. The gear reveal creates a moment of tension before the bonus round starts, and a high multiplier landing before 20 free spins produces a feature round with real potential. The two-part reveal - multiplier first, then spin count - is more engaging than a straightforward spin-up-and-go bonus.

The steampunk theme is well executed for a 2012 release and holds up better than many contemporaries that used cartoon or generic fantasy settings. If you are drawn to the aesthetic, this is one of the cleaner executions of it from that era of slot development.

Similar Games Worth Playing

If the free spins structure appeals but you want a stronger RTP, several Microgaming titles are worth considering:

Thunderstruck II - 96.65% RTP, 243 ways, progressive four-character bonus system with distinct free spins rounds for each character
Immortal Romance - 96.86% RTP, 243 ways, gothic theme with a similar progressive bonus unlock structure
Avalon - 97.13% RTP, 20 paylines, Arthurian theme with free spins and a multiplier - one of the highest RTPs in the Microgaming catalogue
Break Da Bank Again - 95.43% RTP but a 25x multiplier on free spins, focused high-variance approach
Burning Desire - 96.06% RTP, 243 ways, expanding wilds in the free spins round

Our Verdict

Steam Punk Heroes delivers a solid 2012 slot with a distinctive aesthetic and a free spins feature that does something different. The gear-reveal mechanic for multiplier and spin count is well designed - it gives the bonus trigger a two-stage reveal that most contemporary games didn't bother with. At medium volatility, the base game keeps sessions moving without long dead patches.

The 95.88% RTP is the limiting factor. It is not catastrophically low, but players who care about theoretical return have better options. For those who like the steampunk setting and want a free spins round with a proper multiplier selection mechanic, this remains a worthwhile play - just go in with accurate expectations about where the RTP sits relative to the wider market.

What is the RTP of Steam Punk Heroes?

Steam Punk Heroes has an RTP of 95.88%, which sits slightly below the UK industry average of around 96%. The game is developed by Microgaming and carries medium volatility.

How do the free spins work in Steam Punk Heroes?

Landing three or more Steam Punk Heroes scatter logos anywhere on the reels triggers the Steam Punked Free Spins feature. You are taken to a second screen with two mechanical gears - pulling a lever spins them to reveal your multiplier (up to 20x) and your free spin count (up to 20 spins). The free spins can be retriggered if three or more scatters land during the bonus round.

What does the wild symbol do in Steam Punk Heroes?

The W.I.L.D. symbol substitutes for all standard symbols except the scatter. Crucially, it doubles the payout of any winning combination it forms part of. Five wilds on an active payline pays 2,000 coins, the slot's top symbol payout.

How many paylines does Steam Punk Heroes have?

Steam Punk Heroes has 25 paylines, all of which are adjustable. The game uses a 5x3 reel grid and pays left to right only. The minimum bet is £0.01 per payline and the maximum total bet is £50 per spin.

Is Steam Punk Heroes available on mobile?

Yes. Steam Punk Heroes runs on HTML5 and works in any mobile browser without a download. The game adapts to both portrait and landscape orientations on phones and tablets.

Who made Steam Punk Heroes?

Steam Punk Heroes was developed by Microgaming and released in 2012. It is one of several steampunk-themed titles in the Microgaming catalogue from that era. The game is still available at many UK-licensed online casinos.