Dead Cells is described as 'A roguelike, Castlevania-inspired, action-platformer, Dead Cells allows you to explore a sprawling, ever-changing castle, unlock new gear and gain access to unreachable areas. Fight to the death using the weapons and loot you find during each run, slowly building your strength' and is a Platform Game in the games category. There are more than 25 games similar to Dead Cells for a variety of platforms, including Windows, Steam, Playstation, Mac and Nintendo Switch apps. The best Dead Cells alternative is Hollow Knight. It's not free, so if you're looking for a free alternative, you could try Mega Man Rock Force or Castlevania The Lecarde Chronicles. Other Dead Cells like games are Meganoid, Hades, Celeste and Megaman Origins.
The same conception — progress through the series of deaths.