Bit-Tech has an article explaining what is available for gaming on Linux, including both native & Wine games.
Gaming is the one thing that Windows has to offer over Linux. There are plenty of open-source office packages, photo editors, web browsers, mail clients,… but the general impression of gaming on Linux is poor. This is because most big gaming developers only use DirectX in their games; and, as we all know, DirectX is one of Microsoft’s greatest gifts to gamers. But that doesn’t mean there aren’t great games that run natively, or through so-called emulators (though most actually aren’t, which we’ll cover later). In this article we’ll discuss some of those games.