This is the third stable release of gnome-games in the 2.8 series. There are no new feature, only bug fixes and translation updates. Unless you are experiencing problems there is no need to upgrade. Any problems this release does not solve for you should be reported in the GNOME bugzilla (http://bugzilla.gnome.org/).

There is no corresponding update for gnome-games-extra-data, the 2.8.0 release is still sufficient and can be found at: http://ftp.gnome.org/pub/GNOME/sources/gnome-games-extra-data/2.8/