Many people are unaware that Kobo quietly eliminated all of their e-ink games from their latest generation e-readers. This includes Chess, Sudoku and Sketchpad. The e-Readers that are affected by this are the Kobo Touch 2.0, Kobo Aura H2O Edition 2, Kobo Glo HD and the Kobo Aura One. The internet browser is the only feature that is available via the Beta List.
Kobo was the last major company to include games on their entire line of e-readers. The main problem is all of their new e-readers have different sized screens and feature higher resolution screens than the previous generation devices did. Kobo basically had to allocate internal resources to redesign the games so they would work on 300 PPI devices, but it looks like they decided just to kill it altogether.
Games are still available on older devices, such as the original Kobo H2O, Kobo Aura, Kobo Aura HD, Kobo Glo, Kobo Mini and the Kobo Touch.