Yes – you can download and play PUBG: BattleGrounds for free on all platforms. This also applies to PUBG Mobile, which is a completely separate game. Like many online-based games, PUBG has in-game purchase options. You can subscribe to Battle Pass-like packages or spend money on in-game cosmetics. However, even if you don't do these, it's possible to play the game entirely for free. Moreover, PUBG doesn't have a pay-to-win option, so you'll always play on equal terms with everyone.