Basically the objective of the game is to steal your opponents baggage to gain money for your company, and so forth to win. Mainly people commonly deceive one another and it gives you an automatic boost of excitement. You can drive cars, upgrade guns, etc. Link to it:
http://www.crypticsea.com/subrosa/Another game I highly recommend is called 2DWorlds, it's basically a physics sandbox in 2D with a very small and friendly community, most of whom are caring and intelligent. There are barely any rules on it (it's like an anarchy in a way but the users aren't so wild). You can make your own games on 2DWorlds and share them and even have them multiplayer. You can make your own skins on it too. It's a variation of many games combined such as Gary's Mod, Runescape, ROBLOX, Minecraft, and it also has elements of retro games. There aren't any limits when making a game, you can really design and create anything. It has under 1k players currently but roughly 30-50 are active and are on daily, with that being said, everyone knows each-other.
Subrosa is really new though, and it has weird blood and gore animations. Both of these games listed are quite decent.