I will not try to hide that I was and still am the biggest Sega fanboy although I slowed down by the time Xbox 360 and PS3 hit the market. Truth be told, Sega of today is no longer the Sega of Saturn/Dreamcast era. Never the less, great games do come out from time to time and Sonic 4 was a great attempt on bringing old school fans back home. I admit, I bought the game when it came out but never played it seriously until last night before going to bed. I will do my best to summarize everything in unbiased natural review.
Graphics
The graphics look beautiful although some aliasing is visible. I am running the game on mixed resolution and settings and everything looks great. The new cartoonish style is a nice addition to the series. Some of the objects in the background are done in 3D and will have nice effects. The stages look detailed and sonic alike. Apart from the little aliasing I have no complain.
4/5
Gameplay
Well, what can I say.. The gameplay is good but not on the same level as sonic and knuckles. Sonic starts moving in a wired way and feels slow to start. He kinda walks faster without moving his hands which results in a strange movement. The gameplay itself is not glitched or anything but feels slower due to this problem. Everything else including enemies attack looks ok. Sonic’s homing attack feels out of place at first but you will get used to it with time, not as smoth as I hoped it would be. The 3 act per zone returns much like the first Sonic game with a fourth being a boss fight.
The game works with Xbox 360 controller right out the box.
3/5
Sound
The game’s music is ok but not great. Personally, I’m not a fan although the game sounds are Sonic type. The music feels repetitive and uninteresting, at least to me.
3/5
Conclusion
Overall, the game is good. Could have been better but its a good start for episode I. There things to do like leader boards, completing the zones faster and emeralds. Some new eliminates and puzzles were added as well as old school not so great stuff like the Night Casino zone which is full of annoying paths. There are some puzzles which are easy once figure out what to do. Basically, its  Sonic 1 remake. Most of the stages resamble the first Sonic game remade in 3D. Not necessary a good thing but cant really complain. The game is very cheap and die hard Sega/Sonic fans will definitely need to pick this up be it on PS3, Xbox 360 or Steam.