About Coreball

Coreball is an independent gaming hub that pairs a free-to-play HTML5 game library with a dedicated online-slots review section. We have no paid placements: every game and every slot is added on the strength of the title, not who is writing the cheque.

What We Cover

The free-games side of the site catalogues hundreds of browser-playable titles across action, puzzle, racing, clicker, .io, and 16 other categories. New releases land on our new-games feed daily.

On the slots side we maintain a hand-curated lineup of the most-played real-money online slots — browse the slots hub — with deeper RTP, volatility, and bonus-feature breakdowns on each individual game.

Our Editorial Standards

Coreball earns affiliate revenue when readers click through to operators where listed slots can be played for real money. That commission does not influence which slots we cover or where they sit in our rankings. A slot is judged on RTP transparency, volatility behaviour, bonus-feature math, provider track record, and mobile playability — not on the size of the partner payout.

We refresh slot reviews each quarter and remove titles that stop performing for players (RTP downgrades, withdrawn from major markets, provider disputes).

How We Review Slots

Every slot in our lineup gets the same checklist: published RTP cross-checked against the provider data sheet, volatility verified across 1,000+ spins of in-browser play, bonus-trigger frequency timed across a fixed sample, max-win cap stated where applicable, and a final play-it / skip-it call written by a real reviewer. We do not publish AI-generated slot copy.

Our Team

Soren Halvorsen is our Slots & RTP Analyst. With a probability theory background from the University of Oslo and nine years reviewing slot mechanics across NetEnt, Pragmatic Play, Play'n GO, and Push Gaming portfolios, Soren writes every slot review you see on the site.

Contact

Questions, corrections, or new-slot tip-offs are welcome. Visit our contact page or email [email protected].