Deathsmiles I & II is a side-scrolling bullet hell shooter that compiles the two arcade classics from CAVE. Players control angelic heroines battling gothic horror-themed enemies across six stages, using a variety of weapons and a charge attack. The Switch version adds a full training mode, online leaderboards, and the ability to switch between the original and updated versions of each game, preserving the series' fast-paced, pattern-heavy gameplay for handheld play.