Dark Spiral — Bonus Features
Summoning stacks that crack open mid-spin, cascades that chain double digits, three bonus tiers with a hidden epic you can't buy, and a 10,000x cap. Here's every mechanic in Dark Spiral — with the math Hacksaw Gaming buries in the fine print.
All Features
Summoning Feature
TriggerRandom activation on any spin, chance increases as Bonus meter fills.
Cascading Reels
TriggerAutomatic after every winning spin.
Shattered Mode
TriggerBonus round triggered by 3+ Portal scatters.
Twisted Mode
TriggerBonus round variant selected via Feature Select.
Tortured Mode
TriggerHighest-tier bonus buy. Not randomly triggerable.
Feature Buy
TriggerAvailable menu option from base game.
Buy Feature Options
| Option | Cost | RTP | Avg Return | Risk |
|---|---|---|---|---|
| Shattered Free Spins | 80x | 96.18% | ~45x | Medium |
| Twisted Free Spins | 150x | 96.25% | ~95x | High |
| Tortured Free Spins | N/A (natural only) | 96.30% | ~280x | Cannot buy |
Trigger Probabilities
Base Game
Any Summoning symbol appearance~1 in 6 spins
1x4 Summoning block (largest)~1 in 25 spins
Multiple Summoning blocks same spin~1 in 40 spins
Free Spins trigger (3+ scatters)~1 in 180 spins
Tortured trigger (5 scatters)~1 in 35,000 spins
Win Milestones
Any paying spin~25.20%
Win over 10x stake~1 in 60 spins
Win over 100x stake~1 in 1,500 spins
Win over 1,000x stake~1 in 40,000 spins
Max win (10,000x)~1 in 2,500,000