I don't know how many people are familiar with this--heck, I wasn't until now--but there's a "Gamer's Bill of Rights". Well, it's not like it's some super-official thing (it was penned by PC publisher/developer Stardock), but it still makes some good points. It was recently brought into light on account of a few revisions, so here you go:
1. Gamers shall have the right to return games that are incompatible or do not function at a reasonable level of performance for a full refund within a reasonable amount of time.
2. Gamers shall have the right that games they purchase shall function as designed without defects that would materially affect the player experience.
3. Gamers shall have the right that games will receive updates that address minor defects as well as improves gameplay based on player feedback within reason.
4. Gamers shall have the right to have their games not require a third-party download manager installed in order for the game to function.
5. Gamers shall have the right to have their games perform adequately if their hardware meets the posted recommended requirements.
6. Gamers shall have the right not to have any of their games install hidden drivers.
7. Gamers shall have the right to re-download the latest version of the games they purchase.
8. Gamers whose computers meet the posted minimum requirements shall have the right to use their games without being materially inconvenienced due to copy protection or
digital rights management.
9. Gamers shall have the right to play single player games without having to have an Internet connection.
10. Gamers shall have the right to sell or transfer the ownership of a physical copy of a game they own to another person.
Of course, most people here probably have Wiis, so most of these won't apply.