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About The Sirena Expedition
The Sirena Expedition is a 2.5D platformer set in a mysterious, abandoned underwater facility at the bottom of the Mariana Trench. After a recent survey of The Sirena Deep turns up something unusual, an institute director calls a researcher in to investigate. You explore the facility and look for answers about who built it and what it was used for, though some answers may find you instead.
Explore the facility
The game takes about an hour to play through, with hidden content for players willing to search for it. It features PlayStation 1-inspired visuals, a tense underwater horror atmosphere and puzzle mechanics.
Audio and dialogue
Dialogue is fully voiced, and the game has an original soundtrack by beee girlll and Giraffe Cat.
Frequently asked questions
The best price for The Sirena Expedition is $5.99 at Steam. It is the only shop with an offer that activates in your country.
The minimum requirements for The Sirena Expedition are: Windows 7, GeForce GTX 550 Ti, Intel Core i5-2300, 4 GB RAM, 300 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. The Sirena Expedition is a single-player game.
Mostly, yes. Valve rates The Sirena Expedition as Playable on the Steam Deck: it runs, but may need some manual setup.
Yes. The Sirena Expedition is the full base game. You need nothing else to play it.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











