Abnormal1999:SU - Unlocking the 4th Dimension: Dive into Deep-Sea Mystery

8/29/2026, 8:50:13 PM

Release date: 5/2/2024

Tags: #puzzle #psychological-horror #exploration #detective #mystery #2.5d #third-person #singleplayer

User Reviews

Score: 75%8 user reviews
Review Count: 8 reviews
Fetched At: 8/29/2026, 8:50:13 PM

Reference prices

Japan

¥ 350 (JPY)

Steam JP

$2.99 (USD)

Steam

Live Store Snapshot

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Japan Price: ¥ 350
Global Price: $2.99
Price in Your Region: ¥ 350Prices as Steam lists them per country. What you are actually charged depends on your Steam account settings.Regional prices checked: 30 Aug 2026
Sale Status: Regular pricing
Price Checked At: 8/29/2026, 8:45:50 PM

Key highlight

Dive into the mysterious Nautilus submarine in Abnormal1999:SU - Unlocking the 4th Dimension. Solve puzzles and uncover secrets in this 2.5D psychological horror exploration game.

Who this is for

A psychological horror puzzle game with detective adventure elements, investigating anomalies within a submarine lost in the deep sea. Its unique 2.5D graphics and unsettling atmosphere will draw players in.

Details

Overview

Abnormal1999:SU - Unlocking the 4th Dimension invites players into the eerie depths of the ocean aboard the Nautilus submarine. When a sudden mechanical failure strikes, Dr. Pierre must investigate a series of abnormal intrusions. This title blends puzzle-solving, exploration, and psychological horror elements, tasking players with uncovering the secrets hidden within the vessel.

Highlights

Intriguing Setting: Explore the mysterious and unsettling atmosphere of the Nautilus submarine, lost in the azure abyss.
Core Gameplay: Engage in 2.5D deduction and puzzle mechanics, requiring players to combine observations and logic to progress.
Narrative Focus: Follow Dr. Pierre's investigation to unravel the secrets of the Nautilus and the strange anomalies encountered.

Who It's For

This game is designed for players who enjoy atmospheric psychological horror experiences, intricate puzzle-solving, and narrative-driven exploration. Fans of detective and mystery genres will find themselves drawn into the unfolding enigma aboard the Nautilus.

Game Info

Developed and published by QZQ Studio, Abnormal1999:SU - Unlocking the 4th Dimension was released on May 2, 2024. It features a single-player experience with support for English and Japanese languages, among others. The game utilizes a 2.5D perspective and incorporates elements of exploration, puzzle-solving, and psychological horror.