Volatility is the personality of a slot. Get it right and a game feels alive; get it wrong and players bounce.
Massive's maths team builds every title around a target player experience first, then tunes the model to match — running billions of simulated spins to balance hit rate, win distribution and the shape of the big wins before anything ships.
It's slow, deliberate work. It's also why Massive games hold players the way they do.