Deep Sea Fish: Hidden World

Incremental fishing with deep-sea creatures, lasers, and chain explosions

Althea Games · Released Jun 4, 2026

Reviews: Mixed; 67% of 51
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 2 weeks ago; Oct 12, 2026
Minimum PC: GTX 970; 8 GB RAM · 10 GB disk; Full requirements

What is Deep Sea Fish: Hidden World?

A single-player, 2D fishing game where you cast a line, catch fish for gold, and spend your earnings across multiple upgrade trees. You increase your fishing power, unlock abilities, and venture into deeper waters.

For you if...

+you enjoy idle games you can leave running between activities

Not for you if...

−you want a lengthy game with plenty to do afterward

What players say

67% of 51 reviews are positive

Players praise the relaxed atmosphere and art, but criticize linear upgrades and poorly explained mechanics. Several describe progression as increasingly tedious. A recent player also reports a softlock when a high-earning run ends.

Screenshots and trailer

Deep Sea Fish: Hidden World screenshot 1

Deep Sea Fish: Hidden World system requirements

Minimum: GTX 970, 8 GB RAM, 10 GB of disk space.

As published by the developer.

Can my PC run Deep Sea Fish: Hidden World?

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Minimum

OS: Windows 10 64-bit
Processor: Intel Core i5-6600 or equivalent
Graphics: NVIDIA GTX 970 / AMD RX 570
Memory: 8 GB RAM
Storage: 10 GB available space
DirectX: Version 11

Does Deep Sea Fish: Hidden World have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Deep Sea Fish: Hidden World run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Sometimes shows mouse, keyboard or non-Deck controller icons
Some in-game text is small and may be hard to read
All functionality is accessible with the default controller configuration
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS
Achievements: 25
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, French, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Vietnamese.

Does Deep Sea Fish: Hidden World use AI-generated content?

Yes. The developers disclose AI-generated content on the game's Steam page:

Some visual assets and promotional images for the store page were created with the assistance of generative AI tools. AI-generated content is used for marketing purposes only and is not part of the gameplay experience.

The statement mentions: Store page & marketing

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 28, 2026. How to filter AI games on Steam