Sarien.net is formerly the site where you could play, for free, classic Sierra games, such as Police Quest, in your browser. We say "formerly" because Activision owns that stuff now, and its lawyer-mans sent them a letter.
"Well folks, that's that. It was a blast," reads the site's front page. "So long and thanks for all the fish! ... Time to restart, restore or ... quit :)"
The fact Sarien lasted nearly two years probably is an accomplishment. Activision apparently didn't notice until it added in iPhone and iPad browser support. Quoth Acti:
While we appreciate your dedication to the Sierra classic library and understand that you are a fan of these games, Activision has not authorized the development or distribution of these games via your Website. Accordingly, we must demand that you immediately cease any further distribution or exploitation of the Sierra Games on your Website.