Beneath Steel Clouds

Yes. Beneath Steel Clouds is free to play on Steam, so there is nothing to buy to start playing.

The minimum requirements for Beneath Steel Clouds are: Windows 7, 2 GB RAM, 300 MB storage. It also runs on macOS. The recommended specs are in the System requirements section.

No. Beneath Steel Clouds is a single-player game.

Mostly, yes. Valve rates Beneath Steel Clouds as Playable on the Steam Deck: it runs, but may need some manual setup.

Yes. Beneath Steel Clouds is the full base game. You need nothing else to play it.