Cassiculus
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About Cassiculus
Cassiculus is a first-person horror game set in the Oberon Cave. Equipped with a headtorch, you explore the cave in search of your brother and his friends, moving through an isolated and claustrophobic environment shaped by fear and paranoia.
The Oberon Cave
A team of amateur spelunkers set out to explore the mysterious depths of a remote cave in the wilderness. Their excitement turns to terror as they venture farther into the darkness and make a frightening discovery. Atmospheric environments, disturbing audio and horrifying visuals build a sense of dread.
Explore the cave
Cassiculus has no combat. You encounter multiple cutscenes, discover items and uncover other secrets as you search the cave.
Frequently asked questions
Yes. Cassiculus is free to play on Steam, so there is nothing to buy to start playing.
The minimum requirements for Cassiculus are: Windows 10, GeForce GTX 960, Intel Core i5-4460, 8 GB RAM, 5 GB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Cassiculus is a single-player game.
Mostly, yes. Valve rates Cassiculus as Playable on the Steam Deck: it runs, but may need some manual setup.
Yes. Cassiculus is the full base game. You need nothing else to play it.











