69 Balls

Yes. 69 Balls is free to play on Steam, so there is nothing to buy to start playing.

The minimum requirements for 69 Balls are: Windows 7, GeForce GTX 960, Intel Core i5-6600, 8 GB RAM, 200 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.

Yes. 69 Balls is multiplayer only. It supports online PvP.

Mostly, yes. Valve rates 69 Balls as Playable on the Steam Deck: it runs, but may need some manual setup.

Yes. 69 Balls is the full base game. You need nothing else to play it.