About Soren
Soren Halvorsen is Coreball's slots and RTP analyst. He studied probability theory at the University of Oslo and spent the first three years of his career as a quantitative analyst before moving full-time into slot review work in 2017. Since then he has played, timed, and stress-tested more than 600 individual slot titles across the major HTML5 providers — NetEnt, Pragmatic Play, Play'n GO, Push Gaming, Hacksaw Gaming, Nolimit City, Relax Gaming, ELK Studios, and Yggdrasil among them.
Soren's reviewing philosophy is plain: numbers first. Every slot that lands on Coreball is checked against the provider's published RTP and volatility data sheet, then verified across 1,000+ in-browser spins to confirm hit frequency and bonus-trigger behaviour. If a provider quietly drops a 96.5% configuration to a 94% one, the review reflects that change inside a fortnight.
Areas of Expertise
- Slot RTP analysis (theoretical vs. live-data cross-checked)
- Volatility classification and how it ties to bankroll planning
- Bonus-feature value math — free spins, multipliers, scatter pays, hold-and-spin
- Provider release tracking (NetEnt, Pragmatic Play, Play'n GO, Push Gaming, Hacksaw, Nolimit City)
- Mobile-vs-desktop slot performance and UI consistency
- Megaways, cluster pays, scatter pays, and other modern slot mechanics
How Soren Reviews a Slot
For each slot Coreball publishes, Soren works through the same checklist: confirm the provider's published RTP and configuration variants, document the volatility rating with provider data, log the max-win cap, time the average bonus-trigger frequency across at least 1,000 spins, evaluate base-game hit frequency, judge mobile performance and audio behaviour, and finish with a play-it / skip-it verdict written in plain English. Nothing on Coreball is generated by an AI text model.