Dino Clicker

Yes. Dino Clicker is free to play on Steam, so there is nothing to buy to start playing.

The minimum requirements for Dino Clicker are: Windows 10, 1 GB RAM, 350 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.

No. Dino Clicker is a single-player game.

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

Yes. Dino Clicker is the full base game. You need nothing else to play it.