Where can you get support for sierra games

Sierra-online (as it was known prior to the 21st century and being bought out over and over again), and later Sierra, existed only in technicality for years- as of now, it no longer exists at all. It was owned by Vivendi, which merged with Activision, and so now exists only in terms of Activision owning the rights. Activision closed it down for future sale according to Wikipedia. Hence the only support you can get for Sierra games will be from forums of other users. If you mean older Sierra games, or "classic Sierra games", then there is a HUGE community out there, including the game designers themselves who often host their own little web sites and freely chat with their fans. Finding a Sierra games forum and asking other users is no longer your best option: it is, to my knowledge, your only option.