Succubus Idle is a free-to-play 3D idle RPG game developed by mobirix for Android devices. The game is set in a world where the demons have lost their power and players must recover it by embarking on a journey to recover the Familiar Spirit.

The game features an easy-to-enjoy 3D idle RPG gameplay with a hack and slash combat system using a spear. Players can acquire a skill system through the growth of Kid Demon and promote and grow them using equipment. With over 100 types of companion systems that use different skills, players can choose their companions wisely to defeat their enemies.

Succubus Idle also features a ranking system with real-time competition, PvP and demonic beast dungeon content that can be rewarded, and a village system that enables real-time interaction with other users. The game also offers various costumes that add to the charm of the Kid Demon and an idle structure that can grow even through offline rewards.

Overall, Succubus Idle is a fun and addictive game that offers a great idle RPG experience with a hack and slash combat system.