Conclusion: From a gameplay point of view this is a great game with ~ 50 hours worth of content including side missions and collecting all items. (guide2games.org)
All in all most people wouldn't be able to tell this was sequel from the gameplay point of view, but I guess Hideo kojima figured why tamper with perfection. (darkstation.com)
From a gameplay point of view, it functions as a platformer that is very 2D in nature, but the backgrounds are all 3D. (goodereader.com)