Yeah man that Legacy collection is great. Every Metal Gear game ever. Although the Metal Gear Solid 1 (PS) game is download only (code included) -- I wish it was on a disc.
Are you talking about that "Metal Gear Rising" game (hack n slash)? To my understanding that's just an offshoot of the franchise, and the regular Metal Gear series will still employ the stealth and tactical elements. I heard Rising was still a good game though. Just don't play it expecting it to be like the Metal Gear you're used to.