Screenshots
Watch trailer on Steam ↗Castle Rain
BioBit Games · Published by BioBit Interactive Publisher
Last updated 28 Sept 2026
Castle Rain is a 3D top-down action game where you control Billy, a mushroom whose island was devastated by a villain who turned his friends and everyone around into manipulated zombies.
Free
Action, Adventure, Indie, Strategy, Casual · More free games
Explore and conquer as Billy, a mushroom on a quest to reclaim his island from zombies, blending action and strategy in this unique indie game.
About this game
Castle Rain is a 3D top-down action game where you control Billy, a mushroom whose island has been devastated by a villain who turned his friends and everyone around into manipulated zombies. Now, Billy must race against time to stop the dreaded villain Dr. Clamp. Escape, hide, shoot enemies, find weapons, and protect yourself from projectiles in this cartoon-style top-down adventure.
Cure the Enemies
You can destroy zombie enemies or bring them to your side by healing them with an injection. They will then fight alongside you, attacking other zombies and unhealed enemies.
Protect Yourself
You can protect yourself in places and kill everyone who enters your base.
Cure the Enemies
You can destroy zombie enemies or bring them to your side by healing them with an injection. They will then fight alongside you, attacking other zombies and unhealed enemies.
Protect Yourself
You can protect yourself in places and kill everyone who enters your base.
System Requirements
Will my PC run this? →Minimum
Minimum:
- OS: Microsoft Windows 10 or later
- Processor: Requires a 64-bit processor and operating system
- Memory: 8 GB RAM
- Graphics: GeForce GTX 660, Radeon RX 460 or equivalent with 2 GB of video RAM
- DirectX: Version 11
- Storage: 1 GB available space
- Sound Card: DirectX compatible
Recommended
Recommended:
- OS: Microsoft Windows 10 or later
- Processor: Requires a 64-bit processor and operating system
- Memory: 16 GB RAM
- Graphics: GeForce 970, Radeon RX 580 or equivalent with 4GB of video RAM
- DirectX: Version 12
- Storage: 1 GB available space
- Sound Card: DirectX compatible
Supported Languages
English
