Slots Like Treasures Of Mjolnir: PearFiction’s Upzones LockNWin and Jackpot Wheel Explained
Treasures Of Mjolnir drops players into a storm-lit Norse village from PearFiction Studios, running on a 5-reel, 4-row grid with 20 fixed paylines. The default build returns 96.01% RTP, though PearFiction’s own listing also shows reduced configurations of 94.02% and 92.02% at certain operators, so it is worth checking the info screen before staking anything. Independent trackers class it as high volatility, and stakes stretch from 20p up to £50 a spin. A Wild Burst system unlocks new powers as a session goes on, the tiered Upzones LockNWin bonus runs from Bronze up to Diamond, and a four-level Jackpot Wheel tops out at 5,000x the stake. Anyone browsing slots like Treasures Of Mjolnir will spot the Norse dressing immediately, but the coin-collection LockNWin structure gives it a different rhythm to the Megaways and cascade titles that usually dominate this theme.
Where to Play
18+ only. T&Cs apply. Please gamble responsibly.
How the Game Works
Reviewed by Paul StonePublished: July 2026
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Playing card values from J to A fill the lower rungs of the paytable, while a horse, a raven and three Viking character symbols, two bearded warriors and a shield-maiden, carry the mid to top wins. Mjolnir itself does not sit in the paytable as a fixed symbol; instead the hammer drives the Wild Burst mechanic that spreads across the grid once unlocked. The base game plays out on a standard 5×4 grid with 20 fixed paylines rather than a ways-to-win structure, so wins depend on landing matching symbols along the set lines left to right.
Bonus Pot symbols can land on any of the reels during ordinary play, and stacking enough of them fills a counter that eventually opens the Upzones LockNWin round. Spin milestones matter too. As a session passes 50, 100, 150 and then 200 spins, additional Wild Burst powers unlock one by one, so the feature set on offer in spin 300 is noticeably richer than what is available in the opening minutes.
Symbols and Paytable
J, Q, K and A pay the smallest amounts and appear most often. The horse and raven sit in the middle tier, and the three Viking character symbols pay the most of the standard set, worth roughly 2x to 10x the stake for five of a kind depending on which character lands. There is no separate scatter symbol in the traditional sense; Bonus Pot icons and Jackpot Coins handle feature triggering instead.
Bonus Features Explained
The Wild Burst System
Wild Burst is built around six unlockable powers rather than a single fixed mechanic. Early in a session, a triggered Wild Burst simply turns a small electric zone on the grid Wild. Once a session passes 50 spins, a new power joins the rotation, and further powers unlock at 100, 150 and 200 spins, gradually adding effects such as wild stacks, multipliers, respins and the removal of low-paying symbols from the zone. Because the powers accumulate rather than reset, a longer session on Treasures Of Mjolnir behaves differently to a short one, with later spins carrying a wider spread of possible outcomes.
Upzones LockNWin
Collecting enough Bonus Pot symbols opens the Upzones LockNWin round, which runs across four tiers: Bronze, Silver, Gold and Diamond. Bronze starts with the fewest spins and the smallest coin values, while Diamond opens with around six spins and the richest zones. During the feature, coins land inside expanding UpZones on the grid, and each coin can Collect a cash value, Boost an existing zone, apply a Multiplier, add extra Spins, or hand over direct access to the Jackpot Wheel. Landing a fresh coin in an active zone extends the round, so a hot start can run well past its starting spin count.
The Jackpot Wheel
Jackpot Coins collected either in the base game or during Upzones LockNWin charge a wheel split into four guaranteed, ever-growing prizes: Mini, Minor, Major and Mega. Enough coins gathered in one round can trigger the wheel directly without needing a full LockNWin sequence to finish first. Screenshots from the game show the Mega tier sitting well into four figures during play, with the wheel mechanic capable of paying out up to the game’s 5,000x stake ceiling at its highest point.
Bonus Buy (Not Available to UK Players)
Operators outside the UK offer a purchase menu with five entry points, roughly 36.5x to 156.5x the stake, buying straight into one of the LockNWin tiers. UKGC rules strip this menu out of every UK-licensed build, so UK players rely entirely on the natural Bonus Pot trigger to reach the feature.
Pros and Cons
Pros
- Four jackpot tiers plus a coin-collection LockNWin bonus give the game more moving parts than a typical single-feature slot
- Wild Burst keeps unlocking new powers as a session runs on, so a long play session plays out differently to a short one
- 96.01% RTP at the top-tier configuration sits above the UK market average
- The storm-lit Norse art direction and hammer-strike animations are well produced for a mid-tier studio release
- A 5,000x ceiling gives the LockNWin and Jackpot Wheel combination a genuinely big top prize
Cons
- UK players lose the Bonus Buy menu entirely, so the natural Bonus Pot trigger is the only route into the feature
- Reduced RTP configurations down to 92.02% are in circulation, so the info screen is worth a check before playing
- PearFiction’s own listing describes volatility as Medium while independent trackers class it as High, so expect a bumpier ride than the official copy suggests
- The mechanics lean heavily on ideas already used in earlier PearFiction LockNWin releases rather than breaking new ground
- Four different jackpot and bonus systems running at once can feel busy for players who prefer a simpler paytable
Game Screenshot
Demo Play
The widget below runs a free-play build of Treasures Of Mjolnir, spin for spin identical to the real money version, so it is worth working through a few Bonus Pot triggers before staking anything for real. 18+.
Game Information
Expert Take
Coverage of Treasures Of Mjolnir since its September 2025 release has been fairly measured. Reviewers tend to credit the layered structure, the Wild Burst progression and the four-tier Jackpot Wheel with giving the game more depth than a typical fixed-grid release, and the Norse presentation is generally well regarded. The most consistent criticism is that several of the mechanics echo earlier PearFiction titles built around the same LockNWin template, and that the 5,000x ceiling feels modest set against how much is going on mechanically. The gap between PearFiction’s own Medium volatility listing and the High rating used by most independent trackers has also drawn comment, since it can catch players off guard who set their bankroll expecting a gentler ride.
Similar Slots to Try
Four Norse and Viking picks worth comparing against the LockNWin structure used here.
- Thor Stormlord
An earlier 1X2 Gaming take on Thor, running a straightforward free spins structure with none of the LockNWin coin collection or the four-tier jackpot wheel found in this release. - Power of Thor Megaways
Pragmatic Play’s Norse Megaways release trades the fixed 20 paylines and coin-collection bonus here for a top-reel Hammer Wild and up to 117,649 ways to win. - Vikings Go Berzerk
Yggdrasil’s raiding-party slot runs a rolling multiplier free spins round with three selectable Viking heroes, a world away from the jackpot wheel and LockNWin tiers used in this game. - Viking Runecraft Apocalypse
Play’n GO’s Ragnarok-themed sequel runs a cluster pays cascade with rune upgrades, a very different engine to the fixed-payline LockNWin structure found here.
About the Developer
PearFiction Studios is a Montreal-based developer that moved from mobile games into casino slots in 2016 and now distributes exclusively through Games Global, with a catalogue running past 40 titles. The studio built its identity around the tiered Upzones LockNWin format used in Treasures Of Mjolnir, a mechanic that also anchors earlier PearFiction releases such as Squealin’ Riches, Chicago Gold and Blazing Mammoth XL, and its Granny vs Zombies title picked up a shortlist nod at the 2023 iGaming IDOL Awards. PearFiction does not yet have a dedicated developer page on SlotsLike; this section will link through once one is built.
Treasures Of Mjolnir Key Stats
Treasures Of Mjolnir slot information last reviewed: July 2026
| Treasures Of Mjolnir Slot Info | |
|---|---|
| Name: | Treasures Of Mjolnir |
| Provider: | PearFiction |
| Developer Rank: | A newer-generation PearFiction release; the studio sits in the mid-tier bracket on this site, better known for its LockNWin coin mechanic than for headline jackpot brands |
| RTP: | 96.01% at the default setting (reduced configurations of 94.02% and 92.02% are also reported, so check the in-game info screen before playing) |
| RTP Category: | Medium-High |
| RTP Rank: | Around the UK market average |
| Feature Description: | A progressive Wild Burst system unlocking six powers across a session, a tiered Bronze-to-Diamond Upzones LockNWin coin bonus, and a four-level Jackpot Wheel topping out at 5,000x stake. |
| Feature Categories: | Norse Mythology Themed, High Volatility, Lock’N’Win / Jackpot Mechanic |
| Reels: | 5 |
| Rows: | 4 |
| Paylines: | 20 (fixed) |
| Volatility: | High (PearFiction’s own listing describes it as Medium; BigWinBoard, SlotCatalog and AboutSlots independently class it as High, a genuine source disagreement worth noting) |
| Volatility Rank: | Upper-middle tier on the site |
| Min Bet: | £0.20 |
| Max Bet: | £50 |
| Max Win: | 5,000x stake |
| Release Date: | 11 September 2025 |
| Slotslike Rank: | 2,010 out of 4,300+ games (View Top 100) |
Slots with the Same Features
Two further picks worth a look once you have worked through the main list above.
Other Norse Mythology Slots
Neither runs the LockNWin coin structure used here, but both share the Norse setting.
Other Jackpot and Lock’N’Win Slots
Both trade the Norse setting for a different theme while keeping a jackpot-driven bonus at the centre of play.
Frequently Asked Questions
How does the Upzones LockNWin bonus work in Treasures Of Mjolnir?
Collecting enough Bonus Pot symbols opens a tiered round running Bronze to Diamond, where coins landing in expanding zones can Collect a value, Boost a zone, apply a Multiplier, add Spins, or hand over access to the Jackpot Wheel.
What is the RTP of Treasures Of Mjolnir?
The default configuration returns 96.01%, though PearFiction also lists reduced builds of 94.02% and 92.02% that some operators may run instead.
What is the maximum win on Treasures Of Mjolnir?
5,000x the stake is the top prize, reachable through the Mega tier of the Jackpot Wheel.
Is Treasures Of Mjolnir high volatility?
Most independent trackers class it as high volatility, though PearFiction’s own listing describes it as Medium, so treat the official copy with some caution and bankroll for a bumpier session.
What are the best slots like Treasures Of Mjolnir?
Power of Thor Megaways, Vikings Go Berzerk, Viking Runecraft Apocalypse and Thor Stormlord all share the Norse setting, though none use the same Upzones LockNWin and Jackpot Wheel combination.
Can I play Treasures Of Mjolnir for free?
Yes, the demo widget above runs the same odds and features as the real-money version with no deposit or sign up required.
Who makes Treasures Of Mjolnir?
PearFiction Studios released the game on 11 September 2025.
How does the Jackpot Wheel work?
Jackpot Coins collected in the base game or during Upzones LockNWin charge a wheel split into four guaranteed prizes, Mini, Minor, Major and Mega, which can trigger directly once enough coins are gathered.
Our Verdict on Treasures Of Mjolnir
Treasures Of Mjolnir packs a lot into its 5×4 grid: a progressive Wild Burst system, a tiered LockNWin coin bonus and a four-way Jackpot Wheel all running alongside each other. That layered structure is the game’s biggest strength, giving longer sessions a different shape to short ones, but it also means the 5,000x ceiling feels modest next to the mechanical depth on offer, and UK players miss out on the Bonus Buy route entirely. A 96.01% RTP and a well-produced Norse setting still make this a reasonable pick for patient players who enjoy PearFiction’s coin-collection format, even if little here breaks genuinely new ground.
SlotsLike rating: 6/10