Slay the Spire+ invites players into a thrilling card-based strategy game where adventurers delve into perilous dungeons filled with formidable foes. Each player's experience hinges on the unique deck of cards curated to enhance their hero's skills and abilities. Strategic card combinations are essential for overcoming diverse monsters, each possessing distinct powers, necessitating careful planning before engaging in combat. Victorious battles yield valuable rewards, including cards and artifacts that strengthen your arsenal, while failure results in the loss of hard-earned resources. Through skillful gameplay and tactical decision-making, players earn experience points and unlock new cards, driving them closer to achieving their ultimate quest within the dark underworld.