What Sandbox Gaming builds
Mechanics other studios leave alone: expanding grids, feature buys, and slots where you choose your own volatility band before the first spin. Not every idea lands, but the catalogue rarely repeats itself.
Choosing your own volatility
Several Sandbox titles offer two or three volatility settings at the same RTP. The return is identical; what changes is the shape, a higher setting trades hit frequency for a bigger ceiling. It is the clearest demonstration available that RTP and volatility are separate properties, and it is worth playing once for that reason alone.
Feature buys, and what they cost
Buy prices run from 40 to 200 times the stake. A buy is a single stake at its full price, which is why a feature buy breaches the maximum bet rule on almost every bonus: a 100x buy at 0.20 is a 20 stake. If a bonus is running, do not buy. The wagering guide covers the rule that voids more withdrawals than any other.
Where to play them
Feature buys are restricted or banned under several licences, so availability varies by operator more than for most studios. The casinos on this page note it where it applies.