After many years, the well-known vampire and werewolf based game Crimson Moon has been announced Offline. Game was developed by Crimson Productions. They had over 10,000 players in total. Check out the last comments from their review page here.
Crimson Moon was a text-based online vampire game where you could choose either to be a vampire or a werewolf. Discover the underworld of the moon and explore unique items and achievements. The game had great community with monthly events and updates. You could create groups and clans and share your experience with other players in a forum. It was quite an addictive game.
Check out the full list of vampire based browser games from the link below.