Sleeping Dogs could have been great, but is flawed in a few ways. It is a mish mash of GTA, Arkahm City, and Rush Hour..... (ie. open world crime game, fighting controls of Batman game, and Rush Hour story).
It is a pretty lengthy game (from what I've read about 20 hours....I only played about 4 hours). I did enjoy the game, but didn't feel like investing more time.
You rank up with cop, triad, or face experience points based on doing good, doing bad, or helping others. You get money which allows you to buy clothes (some of which give you extra perks).
I think it is a good rent. There isn't much reason to replay that I can see (and no mutiplayer). The real killer is the game just was good, but not great in almost all area. Which makes it solid, but not a must own.
NOTE: This game is filled with cursing so not recommended for kids or anyone that doesn't want to hear an F-bomb every 5th word.
1) fighting is fluid
2) nice variety of missions and activities (main missions, side missions, you drive vehicles)
3) it is an enjoyable experience with a decent story
1) graphics could have used more work
2) camera goes wacky too often