| Provider | NetEnt |
|---|---|
| RTP | 97.04% - Compare RTPs |
| Volatility | Medium |
| Reels | 5 |
| Paylines | 15 |
| Bet Range | £0.15 - £150.00 |
| Hit Frequency | 33.00% |
| Max Win | 1,000x |
| Features | Wilds |
Steam Tower Slot Review
Steam Tower is a NetEnt slot that takes the Victorian era as its starting point and runs with it. Five reels, 15 fixed paylines, a 97.04% RTP, and a free spins feature where the multiplier climbs with every floor you clear - this is one of the more inventive bonus mechanics NetEnt has built into a slot of this era. If you enjoy high RTP slots, Steam Tower belongs near the top of your list.
Steam Tower at a Glance
| Detail | Info |
|---|---|
| Developer | NetEnt |
| Reels / Rows | 5 reels, 3 rows |
| Paylines | 15 (fixed) |
| RTP | 97.04% |
| Volatility | Medium |
| Bet Range | £0.15 - £150 per spin |
| Max Win | 2,000x your bet |
| Free Spins | Yes - with tower-climb multipliers |
| Mobile | Yes |
Theme and Visuals
The setting is a kind of steampunk fantasy grafted onto a Victorian adventure story. A top-hatted inventor stands to the left of the reels, tasked with rescuing a princess trapped at the top of a towering mechanical structure. The dragon guarding her looms in the background. It sounds dramatic and, for a slot released in the mid-2010s, the execution is still solid. Cogs, pipes, and industrial steel frame the reels; the lower-value card symbols (Jack through Ace) have been given a suitably worn, copper-plated look rather than the flat-coloured versions you see on cheaper titles.
The soundtrack runs to a ticking, orchestral score that picks up pace during the free spins round. It is atmospheric without being intrusive. NetEnt has always been strong on presentation and Steam Tower holds up well next to titles like Gonzo's Quest and Jack Hammer from a similar period.
How to Play Steam Tower
The 15 paylines are fixed, so the only decisions you make before each spin are coin size and coin level. The minimum spin is £0.15 and the maximum is £150, which keeps things accessible across a wide range of bankrolls. The autoplay function lets you set between 10 and 1,000 automated spins and includes stop conditions - you can halt the run when a single win exceeds a set amount, or when your balance drops below a threshold you define.
The paytable is worth a read before you start. The princess and the inventor are the two highest-paying regular symbols; land five of either across a payline and you will trigger a meaningful return. The playing card symbols fill the lower end of the table but do not feel as out of place as they might - the industrial styling helps.
Wild Symbols
Steam Tower has two wild symbols. The inventor himself is a stacked wild, meaning he can cover an entire reel when he appears. The harpoon gun is the second wild. Both substitute for all regular symbols to complete winning lines. The stacked nature of the inventor wild is what drives the free spins mechanic, so this is not just window dressing - it is the engine behind the game's main feature.
Free Spins - The Tower Climb
This is the part of Steam Tower that gives it its identity. To trigger the free spins you need to land at least one stacked wild covering a complete reel. That awards 10 free spins and moves you to floor one of the tower.
The tower has 16 floors. Each time a harpoon wild lands during the free spins round, you move up one floor and gain two additional free spins. The multiplier applied to your free spins wins increases as you climb:
- Floors 1-4: 2x multiplier
- Floors 5-8: 3x multiplier
- Floors 9-12: 5x multiplier
- Floors 13-16: 7x multiplier
- Reach the top (floor 16): 1,000 coin bonus on top of your multiplied wins
The combination of a 7x multiplier and the stacked wilds that are still active during the free spins creates the conditions for the game's best payouts. The maximum potential across the entire game is 2,000x your total bet, reached by clearing the tower with optimal wild coverage. That is not a common occurrence but it is a clear target and the floor-by-floor progression gives the feature a sense of momentum that many slot bonus rounds lack.
There is no re-trigger mechanic for a fresh 10 free spins - the harpoon wilds extend the round one floor at a time rather than resetting it - but since extra spins keep coming with each floor climb, long free spins sessions are possible if the wilds keep falling.
RTP and Volatility
The 97.04% RTP sits well above the UK online slots average of roughly 94-96%, and it is one of the reasons Steam Tower has stayed popular for longer than many of its contemporaries. Medium volatility means the game pays out with reasonable regularity - the hit frequency is around 33%, so roughly one in three spins returns something - though the larger wins are concentrated in the free spins round rather than distributed across base game hits.
If you are specifically looking for slots with strong return-to-player rates, Steam Tower sits alongside NetEnt titles like Blood Suckers (98% RTP) and Piggy Riches at the top of the list. The medium volatility makes it more forgiving during the base game than higher-variance titles.
Mobile Play
Steam Tower runs on all modern mobile browsers without requiring a dedicated app. The interface adjusts cleanly to portrait and widescreen orientations; the reel grid and control bar scale well on both phone and tablet screens. All features - including autoplay and the advanced stop settings - are available on mobile. The game predates the move to HTML5 but NetEnt ported it cleanly and mobile performance is solid.
Pros and Cons
Pros:
- 97.04% RTP - well above the UK market average
- The tower-climb multiplier mechanic gives the free spins real tension
- Stacked wilds produce solid base game wins on their own
- Wide bet range (£0.15 - £150) suits most players
- Smooth mobile performance
Cons:
- No re-trigger for a fresh 10 free spins
- Max win of 2,000x is modest compared to modern high-variance titles
- Base game can feel uneventful between free spins triggers
Who Should Play Steam Tower?
Steam Tower suits players who want a reliable, well-constructed slot with a strong RTP and a bonus feature that actually does something different. If you regularly play Twin Spin, Starburst, or Dazzle Me and want a title with more of a narrative bonus round, Steam Tower is worth the time. It is not a slot chasing a massive jackpot - the 2,000x ceiling keeps it grounded - but the combination of medium volatility and a high RTP makes it a steady performer over longer sessions.
Players who want ultra-high max wins or modern features like cascading reels and buy-a-bonus options will find it dated. But for a slot that plays well and pays back fairly, Steam Tower still earns its place on most casino sites that carry a full NetEnt library.
What is the RTP of Steam Tower?
Steam Tower has an RTP of 97.04%, which is above the UK online slots average of around 94-96%. This makes it one of the stronger-returning NetEnt slots available.
Does Steam Tower have a free spins bonus?
Yes. Landing a stacked wild covering a full reel triggers 10 free spins and starts the tower-climb mechanic. Each harpoon wild landed during free spins moves you up one floor and adds two more spins. The multiplier increases from 2x at the base to 7x at the upper floors.
What is the maximum win on Steam Tower?
The maximum win is 2,000x your total bet. This is achieved during the free spins round with the 7x multiplier active on optimal stacked wild coverage. Reaching floor 16 also awards a 1,000 coin bonus.
Is Steam Tower high or low volatility?
Steam Tower is medium volatility. It has a hit frequency of around 33%, meaning roughly one in three spins returns a win. Bigger payouts are concentrated in the free spins round rather than the base game.
Can I play Steam Tower on mobile?
Yes. Steam Tower runs on all modern mobile browsers without requiring a download or dedicated app. The full game including autoplay and all bonus features is available on both phones and tablets.
Who made Steam Tower?
Steam Tower was developed by NetEnt, the Swedish game studio behind titles like Starburst, Gonzo's Quest, and Blood Suckers. It was released in 2014 and remains part of the active NetEnt catalogue.
Where to Play Steam Tower
These online casinos carry NetEnt games including Steam Tower. Read our Donbet review or browse all casino reviews.
Steam Tower RTP and Variance
Steam Tower has an RTP of 97.04%, which is well above average. See our highest RTP slots for the best returning games. Medium volatility offers a balanced mix of win frequency and payout size.
At the minimum bet of £0.15 per spin, a £10 deposit gives you 66 spins with a statistical expected return of £9.70. Read our slot betting strategy guide for tips on managing your bankroll.
More NetEnt Slots
If you enjoy Steam Tower, try these other NetEnt games available at the same casinos.
