indiegame.fan
Hydra - Poseidon's conspiracy header art

Hydra - Poseidon's conspiracy

An agent probing a Third Reich bunker on a desolate island faces a survival horror nightmare. Battle deep-sea monsters in FPS or TPP camera mode. Forge your fate with 5 unique endings in a chilling descent into cosmic dread.

Steam Page
Release
April 25, 2025
1 year and 99 days ago
Steam Reviews
Positive15 reviews93.3%

Does this feel indie?

Vote based on whether this game feels indie to you. You can change your vote at any time. Results earn an IGF score after 10 accepted votes.
No votes yet
Vote on More Games
Game contextLatest: IGF Team
ContextThe evidence factors used to assess whether this game belongs on IndieGame.Fan.Status
Notes
Latest Contributor: IGF TeamEdit notes
Updated: Jul 14, 2026Developer scaleThe operating scale of the game's developer.
Updated: Jul 14, 2026Publisher scaleThe operating scale of the game's publisher.
A separate publisher is listed without a proven bounded regional or service-only role.
Search Google: Is Hydra - Poseidon's conspiracy self-published or published by FM Simple Games Studio and Sons of Welder?Publisher statusHow the game's publishing relationship is classified.
Search Google: How is Hydra - Poseidon's conspiracy and FM Simple Games Studio and Sons of Welder funded?FundingThe known source of funding behind the game.
Search Google: Who controls the creative direction and IP for Hydra - Poseidon's conspiracy and FM Simple Games Studio and Acid Arrow Studio?Creative controlWho appears to retain creative control of the game.
Updated: Jul 14, 2026Release statusWhether and how the game has been released.
The title released with a separate publisher relationship.

Media

24 items

About the Game

Gameplay:
- Investigate eerie clues and solve puzzles to uncover the bunker’s dark past.
- Battle otherworldly creatures rising from ocean depths.
- Scavenge resources to endure unrelenting horrors.

Features:
- Dual perspectives: Toggle between FPS and TPP anytime.
- 5 unique endings: Your decisions define the outcome.
- Immersive audio: Haunting soundscapes amplify the terror.
- Retro-modern fusion.
- Mental health system.

You have been sent to the island of Kanaan to find an abandoned research facility of the "Third Reich".

During the briefing, you received information that the facility was engaged in researching parallel dimensions and collecting information about ancient deities.

There are various legends about the island of Kanaan, some say that it was once inhabited by a tribe worshiping ancient sea deities. Others claim that the control over the island belonged to the fish people.

Four months earlier, tectonic tremors occurred throughout the archipelago, as a result of which tsunami waves rolled through the islands, but by some coincidence they missed Kanaan, but many of the buildings were damaged or collapsed.

Hydra is a detective game with survival horror elements. The main character's condition is described by three parameters: health, endurance and sanity. The player's task during the adventure is to keep these parameters at a decent level. Seth's character can die from the damage dealt, but he can also fall into madness. Endurance describes how long our character can run, parry blows or attack with melee weapons.

The player can use two different perspectives. From an isometric perspective, the hero can fight in contact using a melee weapon and also parry opponents' attacks. In first-person mode, we see what Seth sees through his eye implants. Seth was injured and lost his eyesight during one of his missions for the NML corporation. The corporation was "gracious" enough to provide him with the cheapest eye implants so that he could continue working for them. The implants have a night vision and environmental analysis mode that can mark useful elements of the environment.

During the investigation, we will find various useful items such as weapons, notes, food, medicines and utility items related to our task.

On our way, we will also encounter characters who may be able to provide us with helpful information or will be unfavorable towards us. The island of Kanaan is also a place where terrifying creatures come out of the dark sea.

The game has five ending variants, depending on the player's actions.