Sonic & Knuckles

This Achievement is simple enough, all you have to do is complete the game as Knuckles. That means completing Mushroom Hill, Flying Battery, Sandopolis, Lava Reef, Hidden Palace and the final boss on Sky Sanctuary. Considering that you can save anywhere in the game from the pause menu, you shouldn't have a problem with lives - if you think you are going to die, save it and if you do, reload the game.

Knuckles Finale - 25G (Original Achievement)

Difficulty: 4/10

To get this achievement simply clear all the zones with Knuckles up to the final zone for him, Sky Sanctuary. Here you will have to fight a 2 phase Final Boss fight with Metal Sonic. The first phase, he will either try to dash through you or slam down on top of you. (Watch the video below for more details on dodging). In Phase 2 Metal Sonic will use the Master Emerald to become Super Metal Sonic and will dash around above you. After a bit he will either charge down at you or blast you with 3 energy balls. Dodge the charge with a jump and attack him as he falls to the ground after the 3 energy balls or when he is jumping onto the Master Emerald. When he is on the Master Emerald do NOT attack him. He can also shoot a field of rings out at you that will hurt. Again watch the video for info.

Here is a link to my YouTube playlist for this game, showing all the levels and how to clear them, hope is helps!

http://www.youtube.com/playlist?list=PL4EF16ECA22F9D140&...