You were kept hidden by G.U.N., the Guardian Units of Nations; a military organization, who protects Earth from any threats. Since you have powers like the others, you’re seen a threat due to not being good like them.

You’re in other terms, are like Shadow, he was evil, but now he isn’t. And you’re seen as hostile and untrustworthy. Some of the scientists at G.U.N. have made you worse, and you have finally broken out, and since Sonic and the others are known to work with G.U.N., they are your target.

You had finally broken out, and are now in the woods, G.U.N. is still looking for you, and now Sonic and the others are after you. Not to mention Dr. Robotnik is now after your powers.