IMPORTANT FOR BEGINNERS/NEWCOMERS:

The Sonic stages in the game are great, but something that a lot of people don't know and is crucial if you're playing this for the first time is that the port has a lot of issues and some major ones that go unnoticed, specifically regarding left stick sensitivity, which contributes to slippery controls and breaks the rail grinding mechanic. You can't switch rails or balance on them properly. The INPUT CONTROLS MOD fixes this, although it will still feel slightly twitchy at first, it will feel a lot better once your muscle memory adjusts.

Two more mods for fixing issues with this game's port are the Sa2 volume Controls & Sa2 Render Fix. These are the main mods required for fixing the port, you'll need the Sa2 mod manager which will be on the mod page. It's as simple as extracting/copy and pasting the mod manager into the game files and the mods into the mod folder (create one if one doesn't exist,) then open the mod manager, tick the box then save and your done.

Mods that are not required but improve the game:

Better Radar - this improves the treasure-hunting stages, making them faster to complete. A tip for these stages that the game doesn't tell you (mod not required) is that interacting with the monitors in each stage will give you three hints to the location of each emerald shard. There's also a very useful upgrade in Aquatic Mine for knuckles.

Action Remap - Rebinds the light speed dash to Y/triangle so you don't accidentally perform the wrong action

Reduce Spin dash Delay code in the codes segment of the mod manager - this simply reduces the delay between pressing X/square and when the spin dash begins charging, making it faster to perform and improving game flow.

Infinite lives code in the codes segment of the mod manager - speaks for itself. In case you don't like the lives mechanic.

That's about all that is needed for the game. Hopefully explained in an easy to understand way for newcomers.

i liked the part where sonic and shadow started making out

Beautiful game all around ^_^ great music, great levels. lots of characters to play with.

P.S: SEGA I want more games where I can play as Eggman :D give me the egg