In and Out is a NetEnt slot built around Avalanche wins, where matching symbols disappear and fresh symbols drop into place for repeated evaluations on the same round. Wild symbols can substitute for most other symbols, while Bombs may remove nearby symbols and expand the play area up to a maximum of 8 reels and 7 rows. The game also uses tiered highlighted positions, moving from bronze to silver, gold and diamond as wins land on marked tiles.
The demo version lets players play for free and practice before playing for real money. Free Spins can be triggered by Bonus or Super Bonus symbols, with the number of spins affected by the type and number of Bonus symbols that appear. During Free Spins, the same Avalanche mechanics remain active, and the highlighted tiles from the triggering spin are carried over until they are used in Heist Mode.
Heist Mode begins when a highlighted area and Chloe symbol appear together after Avalanches. In this feature, unoccupied positions spin individually and can land Coins, Diamonds, Bonus symbols, Heist Mode symbols, multipliers, Upgraders, Bursts, Extra Life symbols and Collectors. Coin and Diamond values vary by tier, while multipliers apply to collected values at the end of the bonus round.