Connected!

Yes. Connected! is free to play on Steam, so there is nothing to buy to start playing.

The minimum requirements for Connected! are: Windows XP, GeForce 8600 GT, Intel Core 2 Duo, 75 MB RAM. It runs on Windows only. The recommended specs are in the System requirements section.

No. Connected! is a single-player game.

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

Yes. Connected! is the full base game. You need nothing else to play it.