Sonic 2 Unimpossible started out as a joke hack. I was screwing around and made it so that you gain a life every time you die, you can't drown, and you don't need rings or emeralds to go Super (and it doesn't consume rings). Needless to say, this was all just for the lulz. And it was good. But then I realized it was impossible to get a game over (hence where the name of the hack came from), and being Oppositionally Defiant, as I am, I was determined to get a game over in the un-game overable game. So I did some more hacking, and now here we stand. The current concept of the game? Everything listed above.
But you might ask "Wait, doesn't that mean it's still impossible to get a game over?" No. See, the game runs on 8 bit hexadecimal. What does that mean? It means there is no number larger than 255. It basically means that 256 = 0. Now I've made the hack so that in addition to gaining a life every time you die, you gain a life for every ring you pick up. By this method, you get 256 lives quite quickly. Now recall what I said: 256 = 0. Because of its 8 bit programming, the game automatically resets your life count to zero once you have 256 lives.
Initially, this didn't give you a game over. You could have zero lives without getting a game over. This is because you're not supposed to be able to have zero lives without dying, so the original game only ran a game over check upon dying. I rewrote the game over subroutine and added a branch to it in Sonic's main routine, so that every frame it checks if you have lives, and if you don't, your game is over. So now, having 256 lives is the end for you. And believe me when I say that it makes the game incredibly difficult.
Currently, the game is in its second demo version, v1.75. Starting with v2, I plan to have completely new level layouts (where there isn't a single place in the game that FORCES you to collect rings, like there are plenty of in the original game). I fully intend for v2 to be not only the next release, but the final release.
Super Sonic without emeralds or rings (consumes no rings)
Increased speed (greatly)
Deaths give you lives
Rings give you lives
Ring monitors give you 10 lives
1up monitors take away 10 lives
Sonic 3 style activator for Super Sonic
Tails' flight ability
Invincibility monitors allow you to get rings without gaining lives, and can be broken open even as Super Sonic
End of level bonuses changed
Ashura code implemented (replacing the 14 continues code)
Three digit life counter
LIGHTNING SHIELDS LOL
Currently known bugs:
Super transformation sound effect (Now I'll show you! Grrraaaahhhh!) plays really fast and high pitched
New level layouts (you'll thank me when you reach Casino Night)
Finish spriting Ashura
Need someone to do level layouts. Coding is finished.
Oh, and here's the link. And yes, it actually is possible to beat legitimately, just a pain.
Sonic 2 Unimpossible v1.75