| App Type | demo |
| Full Game | Old Ninja : UnderWorld |
| Release Date | Unknown |
| Details Last Modified | September 14, 2025 (1 year ago) |
| Developer | WaterfallStudio |
| Publisher | Waterfall Studio |
| Supported Systems | Windows |
| Price | Free |
| Required Age | 0+ |
| Support Email | my.waterfall.studio@gmail.com |
This is the demo version of Old Ninja: Underworld. This game is a 2D pixel-art Metroidvania action game where an aging ninja explores a chaotic underground world. Battle through a bizarre mix of enemies with no apparent connection, strengthen your ninja, and challenge the boss lurking deep below.
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