There are a few browser games on gamevial.com. They are multiplayer.
Animal Jam. Like Club Penguin, it is filled with a bunch of stupid and disrespectful children, but I can block them. However, many ppl hate nonmembers, there are scammers who like to steal stuff, and there are noobie wolves who roleplay as warrior cats (I dont have a problem with wolves as warrior cats on AJ but when they attack you just because you are roleplaying as a harmless dog, it gets really under your skin.) And sadly there are online daters and people who roleplay sick, nasty, dirty stuff then upload it to YouTube and call it something like "Animal Jam Mating" and well, the people who do this kind of stuff dont know AJ is a game for kids 3-12 (Although kids over 12 join too) and are making little kids learn stuff that they shouldnt learn until they are older. However, you can always block them.