Sega created Sonic 3 and it's sequel Sonic & Knuckles in 1994, and S&K had a lock-on with it. If you locked on Sonic 3, you can play this! This game is so fun to play and you can do the level select and debug mode a lot easier than Sonic 3, because for that you go up, up, down, down, up, up, up, up when the SEGA screen fades black and before the screen turns white again. For Sonic 3 & Knuckles you enter Angel Island Zone and swing on a vine and press left, left, left, right, right, right, up, up, up and press Start + A but to do debug mode you go to Mushroom Hill Zone (on level select) and grab on to the thing that you pull down to get up to the platform (forgot what it's called) and enter the same code as in Angel Island Zone and press Start + A.

Now, this was the first (and only) appearance of Hyper Sonic but they didn't use him in any other game for some reason. The difference between Super and Hyper Sonic is Hyper Sonic cannot drown but Super Sonic can. Also Hyper Sonic is all 7 colors of the Super Emeralds and Super Sonic is only yellow. The graphics of characters and objects are really good.

Sega made a very good job converting these 2 games together and adding Knuckles as an available character, but the soundtrack is awesome. Listen to Ice Cap, Hydro City and Flying Battery. (sorry for splitting Hydro and City up, I needed to keep my spelling correct.)                                                                                                                                                                                                                                                                       I will always play this game no matter what. Like Sonic 3, Every time Sonic fails me, I play this game. Not much to say here except it's AWESOME!
                                                                                                                                                                                                                                                            The main story is that Knuckles was tricked by Dr. Robotnik being told Sonic and Tails were evil and were trying to take the emeralds so Knuckles took them off Sonic, but in Hidden Palace Zone Knuckles helps Sonic and Tails get out and he tries to take the Master Emerald off Dr. Robotnik after Sonic tells Knuckles he was trying to get the Chaos Emeralds so Dr. Robotnik couldn't get them and he wants to give them to Knuckles. So that's the story.                                                                                                                                                                                                                                                                                                                                                                                                                                                     This game takes a few days to beat and has a save screen where you can save the game, but if you choose no save mode and speed run the game, it takes about 2 hours. Meh, took me weeks to beat Sonic 3.                                                                                                                                                                                                                                                                                                                                                                                         The difficulty is in the middle really, because it is easy and hard at the same time, the easy bit being the bosses, the medium bit is beating the game, and the hard bit being collecting all the Chaos and Super Emeralds. So basically the game play is easy, and the special stages are hard.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         So that's my review for Sonic 3 and Knuckles, and it took me ages to write up, so I hope you enjoyed it! Bye!

Aska1987 : A decent review but I think you should have broken the review up into chunks and reviewed each individual section, such as Graphics, Music, depth... so on.
Still a good review though - hope to see more from you in the future.

I agree with Pika, this is a good review but there could be more detail. You could also give grades for the different categories.

sonic 1 is not as this master piece