Old Ninja : UnderWorld
Release date: Sep 19, 2025
Developers: Waterfall Studio
Publishers: Waterfall Studio
Genres: Action, Adventure, Indie
Categories: Single-player, Camera Comfort, Custom Volume Controls, Playable without Timed Input, Stereo Sound, Partial Controller Support, Family Sharing
Supported languages: Japanese, English

Old Ninja: Underworld – Overview 🔍 Exploration The underground world is a labyrinth, much like an ant nest. Some paths may be inaccessible at first. In such cases, explore thoroughly and search for upgrade items. These items will guide the ninja to new areas. ⚔️ Combat The ninja wields not only swords and shurikens, but also a variety of attack techniques. Use them wisely to challenge formidable enemies. 📈 Upgrades Defeating monsters in the underground world grants experience points. Leveling up enhances your abilities. Power up and cut through the hordes of monsters. 👹 Monsters Various monsters roam the underground world, seemingly originating from different realms. Defeat the final boss lurking deep within this chaotic domain. 🔥 Fast Travel Campfires are scattered throughout the world. You can fast travel between them to explore the underground world more comfortably. 📖 Story This game has no story—none at all. It’s purely focused on exploration, combat, and upgrades. That’s what it does, and it does it well. Note: Xbox controllers are supported, but some actions—such as settings and fast travel—may require mouse input. Thank you for your understanding. Note: Key configuration is available, but please note that some display elements may not appear correctly. We appreciate your understanding. Note: To ensure a comfortable experience with the full version, we recommend trying the demo first. Please check the system compatibility and gameplay feel before making your purchase. Streaming Guidelines Include the store page URL in the video description. Include the title “Old Ninja: Underworld” in the video title. As long as these conditions are met, you are free to stream or create videos using this game. Monetization is allowed. ────────────────────────────── Estimated completion time: 1h~2h