The Sirena Expedition
Released Oct 2023
The Sirena Expedition is a short PSX-style horror-platformer in which you explore a mysterious underwater facility.
82% positive · 134 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence
Where to buy
Steam $5.99
Can't confirm — worth a look
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Evaluation
The Sirena Expedition is a short solo-developed PSX-style horror platformer that launched on Steam on October 26, 2023. After launch, the developer (Giraffe Cat) continued polishing the game with several feature patches — adding post-game content, a checkpoint system, an accessibility menu, and new music.
On February 19, 2024, the developer shipped v1.10, which added the final pieces of music and concluded with a clear statement: "I think the game is (finally) done!" This followed an earlier post from February 1, 2024 (v1.09) where the developer described that update as "the second last update to The Sirena Expedition." The only remaining item at that point was a soundtrack release, which arrived on April 15, 2024.
After the game's content was wrapped up, the developer announced a Nintendo Switch port (launched August 16, 2024), but this represents a platform expansion rather than new game content.
The only DLC listed is the official soundtrack, which has been released. No further content has been announced, and the developer's own communications make clear that the game reached its finished state. The game can be considered a complete, standalone experience.
Evidence
Developer shipped v1.10 with final music additions and stated: 'I think the game is (finally) done!'
Developer described v1.09 as 'the second last update to The Sirena Expedition', with only the final music patch remaining
Content
1 of 1 released · no outstanding content
Media
Details
Developer
Publisher
Giraffe Cat
Achievements
12
Platform
Windows
Controller
partial support
Steam Deck
Playable
Players
Single-player
About this game
"I remember getting the call vividly. I was trying to finish up for the day, but a stack of paperwork was keeping me late. To be honest, I was also looking for reasons not to go home. My phone rang, I answered it, and the director of the institute was talking, albeit disjointedly, about something that had turned up in a recent survey of The Sirena Deep."

Explore a mysterious, abandoned underwater facility at the bottom of the Mariana trench. Who built it? What was it used for? Perhaps you will find answers, or perhaps the answers will find you.
You can play through The Sirena Expedition in about an hour. However, there may be some hidden content, for those willing to look for it.

- A 2.5D platformer with PlayStation1-inspired visuals.
- Tense underwater atmosphere and horror.
- Innovative puzzle mechanics.
- Fully voiced dialogue.
- Original soundtrack by beee girlll & Giraffe Cat.
Last evaluated Jun 22, 2026
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