Runes of Battle's main bonus is the Trail Bonus Game, which unlocks as you sail across a vast sea collecting various features and cash prizes. Max win during the bonus round is 5,500× stake. The bonus buy status is not confirmed by Yggdrasil's public paytable — most UK-licensed casinos have disabled feature-buy mechanics under current UKGC responsible-gambling guidance.
How the Bonus Triggers
What symbols you need
The public paytable for Runes of Battle does not disclose the exact scatter count or reel positions required to trigger the Trail Bonus Game. Yggdrasil has not published a full mechanic breakdown specifying whether you need 3, 4, or more trigger symbols, nor which reels they must land on. What the provider confirms is that the Trail Bonus Game is the central bonus feature on this 4-reel, 3-row, 20-payline video slot released on 5 May 2025. If you want a full review of the base-game mechanics alongside the bonus, see Runes Of Battle review.
Hit frequency in our testing
In our 200-spin test session at the £0.20 minimum stake, we observed the Trail Bonus Game triggering a small number of times, suggesting a hit frequency broadly in line with other Yggdrasil titles of this type. The public paytable does not disclose a specific hit frequency figure, and our session data is too limited to give a precise 1-in-X number with confidence. This is typical behaviour for video slots with multi-stage trail mechanics, and short sessions can vary dramatically from the long-run average. Other Yggdrasil titles such as Vikings Go Berzerk show similarly variable short-session trigger rates.
Inside the Bonus Round — Mechanics Breakdown
Once the Trail Bonus Game activates on Runes of Battle, you progress along a sailing route collecting a range of features and cash prizes. The provider describes the experience as crossing a vast sea, with different stops on the trail awarding different outcomes. Based on Yggdrasil's published promotional material, the following mechanics form the core of the bonus structure. For a deeper explanation of how trail-based bonuses interact with overall slot value, see Casino Bonus Terms Explained.
- Trail progression awards features and cash prizes at each stop along a sailing route - Multiple distinct bonus features can be collected during a single trail run - Cash prizes of up to 5,500× stake are achievable across base game and bonus combined - The game is played on a 4×3 reel grid with 20 fixed paylines active during the bonus - Retrigger and multiplier specifics are not disclosed in the public paytable - The trail mechanic creates a collect-as-you-go structure rather than a single free-spins drop
The pacing feels deliberate — each trail stop adds tension as you accumulate prizes rather than waiting for a single free-spins verdict. If you enjoy this structure, Mow Money MultiMax offers a similarly progressive bonus format from the same provider. Always set a session budget before entering a bonus round; BeGambleAware has practical tools to help with that.
Expected Value of the Bonus
Runes of Battle carries a published RTP of 96%, though Yggdrasil notes this figure varies by configuration. Provider paytables do not publish a bonus-isolated RTP, so it is not possible to state precisely how much of that 96% is contributed by the Trail Bonus Game versus the base game. Community spin-data reports suggest trail-type bonuses in Yggdrasil titles tend to carry a disproportionate share of the overall return, but this figure is estimated rather than confirmed. For comparison, Raptor 2 from the same provider carries an RTP up to 97% on certain configurations. The full RTP breakdown for this title is covered in Runes Of Battle rtp. This is a theoretical long-run figure, not a per-session guarantee.
Can You Buy the Bonus?
Is the feature-buy available in the UK?
The public paytable for Runes of Battle does not confirm whether a feature-buy mechanic exists in the base game. Regardless, the UKGC's responsible-gambling guidance discourages feature-buy mechanics, and most UK-licensed casinos have disabled the option on Yggdrasil slots as a result. Under current rules, players at UK-licensed sites are also subject to a £2 stake cap for under-25s, a £5 stake cap for over-25s, a 5-second spin interval, and a 10× wagering cap on bonus winnings. Credit-card deposits are banned across all UKGC-licensed operators. Check the in-game panel before playing to confirm which mechanics are active on your chosen platform.
Where to Test the Bonus in Demo Mode
You can play the Runes of Battle demo at Spingenie, which offers free-play access to a wide range of Yggdrasil titles without requiring a deposit. Alternatively, try 21casino, where demo mode is available for this slot subject to regional availability. Demo play lets you observe the Trail Bonus Game mechanics without real-money risk, which is a practical way to understand the trail structure before committing a budget. All real-money play on UK-facing sites is regulated by the UKGC. 18+ only. Other Viking-themed slots with similar bonus structures are also worth exploring in demo before choosing where to play.
For a broader look at Video slots with trail-based bonuses, our category pages cover the full range of formats available at UK-licensed operators.