3D Paraglider

Yes. 3D Paraglider is free to play on Steam, so there is nothing to buy to start playing.

The minimum requirements for 3D Paraglider are: Windows 7, Intel HD Graphics 4000, Intel Core i5, 4 GB RAM, 8 GB storage. It also runs on macOS. The recommended specs are in the System requirements section.

Yes. 3D Paraglider has multiplayer and a single-player mode.

Mostly, yes. Valve rates 3D Paraglider as Playable on the Steam Deck: it runs, but may need some manual setup.

Yes. 3D Paraglider is the full base game. You need nothing else to play it.