As a HARDCORE gamer (PC and 360) with all the other Rainbow titles, I can say with experience, VEGAS is a major letdown!
User Rating: 4.2 | Tom Clancy's Rainbow Six Vegas X360
I love the original PC Rainbow Six, own all the copies of Rainbow for 360, and (even the awful Critical Hour and Lockdown titles). Vegas is the WORST of all of these! Why? Well, if you’ve been frustrated by AI programmed to see you through walls, respawn behind you in rooms you just cleared and appear in the same place over and over, WELCOME TO VEGAS! I quit the campaign because I died in the same place so many times no matter what I did (on realistic mode) and I routinely beat PC and 360 shooters on Hard mode. Multiplayer might be great, but repeated attempts on different days yielded unplayable lag, I tired even though I’ve had no problems with any other game I play (GRAW 2 works fine). There is a sound glitch that sounds like a JACKHAMMAR that just goes on and on. I tried lone wolf mode and found the sniper rifle useless because the NPCs don’t patrol, they jump out around corners at you and burst through doors behind you. Like stealth? Forget it! A silent pistol/rifle is a waste of time, as they NPCs know were you are before you get in sight. I could go on and on about why this game is awful, but you’ll probably buy it based on hype anyway and learn the hard way (like I did) or hopefully your standards aren’t as high as mine. 
