Whisper of Shadow is a free roguelike strategy idle game available on iPhone. Players navigate treacherous dungeons, engage in random events, summon heroes, and battle against devils. Set in a dark world where humanity struggles against its own corruptions, players assume the role of a savior tasked with uncovering secrets, rescuing humanity, and halting the spread of darkness. The game features a compelling storyline that unfolds as players progress through various levels.

The gameplay emphasizes strategic decision-making, where each choice can lead to rewards or curses. Players can explore diverse environments like the Magma Temple and Boreal Furnace, encountering a plethora of heroes along the way. Whisper of Shadow also allows players to summon, collect, and develop their heroes while customizing their squads through various build systems, ensuring a unique gaming experience with each playthrough.