ADelusiveMan wrote...
Name one game that has succeeded with making a high quality multiplayer and single player at the same time.
If you come up with at least three, I'll be surprised.
Multiplayer is bad because a developer usually focuses on one or the other - and the one that gets the least attention is downright terrible. The truth is, Mass Effect doesn't need one. It's has always been about a player being immersed in the story.
And keep co-op the hell away from Mass Effect as well. The last thing I need is people who like to goof around when I need support.
Do you want me to name one or three?

1). Alien vs Predator -- preferrably the older series, though I was a huge fan of the multiplayer and singleplayer in the more recent release.
I don't think it's true that the developer usually focuses on one or the other.
Ask yourself, was Halo a multiplayer or single player game?
Because the first game had bare-bones minimum multiplayer. It used recycled assets. The game only got popular because of 16 people halo LAN parties, which were always awesome. The subsequent Halos put a greater focus on multiplayer, but they've also used like 3 or 4 games to develop the multiplayer experience as it exists now.
As far as two more games with high quality multiplayer and single player:
2). StarCraft -- the campaigns are difficult and involved, used cinematics and voice acting to increase immersion. The multiplayer is also awesome.
3). The original Quake/Doom games.
And those are just the ones that I think other people will agree with me on. I like the SP and MP in GOW for instance. And I could name a bunch of RTS games that have great campaigns (Age of Empires II, WC3) and also awesome multiplayer.