LibreOffice, Calibre, Blender, VLC, etc, are applications available in Ubuntu (as default or via Ubuntu Software Center), yet, as we can observe across the internets, there are millions and millions of users interested in gaming.
Consequently, months ago, the developers started a serious work on bringing games to Ubuntu, effort materialized in the exciting landing (can be redeemed via) of numerous Humble Indie Bundles into Ubuntu Software Center, games from the globally-known Electronic Arts, as well as various games.