From Helpless Infant to Unstoppable Brawler
A portrait-mode mobile idle game where a discarded devil prince evolves through an endless treadmill of auto-combat, strategic gear loadouts, and a massive skill tree — all while the Underworld trembles at his ascent.
Your character visibly grows through 8 life stages — from a helpless Baby to the fearsome Abyssal Sovereign.
Distance-based auto-combat with a dual-radius proximity system. Your demon fights automatically as you progress.
Choose your path through 4 unique skill branches. Every playthrough offers a different build and strategy.
Draw equipment using Bloodstones! Merge and upgrade your gear to create the ultimate demon loadout.
Build and manage your own dungeon empire in the Underworld. Expand your dominion as you grow stronger.
Progress even when you're away. Offline earnings ensure you always come back to meaningful growth.
Grow Slow Idle Adventure is a portrait-mode auto-brawler / evolution idle RPG developed by GrowSlow.
The Runt, a bastard devil prince, is cast into the abyss to die. Through ancient magic, he survives — and begins an impossible ascent. Forced to physically evolve from a helpless infant into an unstoppable force of nature, he fights through hordes of enemies, collects powerful gear, and grows his dungeon empire to claim vengeance and a throne in the Underworld.
Inspired by the depth of Melvor Idle, the progression of Tap Titans, and the evolution fantasy of Solo Leveling.
Download now and begin your ascent from the abyss.