Twinkle Snow from Sonic Advance 3?
Nope to both answers. ^__^
Is it Speed Highway from Sonic Adventure?
1) Something to do with the cars at the last bit.
2) The last area is a bit GTAish
3) A lot of Police cars
4) The begining is over Pit O' Deaths and there is a few leaps.
I'm gonna have to dissapoint you again and say no. ^^
Is it Mystic Mansion from Sonic Heroes?
Is it Altitude Limit from Sonic Rush?
1) Red enemies are harder to avoid than blue ones
2) Sonic gets shot out of a launcher into the air?
3) Spike traps everywhere.
4) Pits o' doom
5) DUH!! It's Sonic Rush.
Please Go Away.
Is it Toy Kingdom from Sonic Advance 3?
1) There is a Jack in the box spring if its red spikes come out, if its blue a spring comes out.
2) There were panda cars.
3) Little Beefeater Soldiers
4) There were Pits O Death on the boss.
Nope to all. ^^
1 - Red is a bigger threat than blue.
2 - GTA: Sonic!!
3 - Cold reception.
4 - Look out beeeelooooooow....
5 - NOT from Shadow The Hedgehog
6 - Swing low, sweet chariot...
Consider this warning #1, TUS. I'm dead serious about ceasing use of those - and you definitely posted that after reading my post telling you to stop (believe me, I checked the time of both posts).
Can we just call this a draw and let someone else go? Gyser's being mean. 
Never.
*Starts waving union jack*
Did we give up when Hitler invaded America? (Oh yeah it happened) No.
Did we give up when Jack Thompson said something? No.
Did we give up when Pat L said the same thing for the twentieth time? No.
Did we give up when we saw Shadow with a gun? N...Yes.
Did George W Bush give up after that DUI? No.
I'm going for Eternal Engine.
Is it Ice Cap in Sonic 3/& Knuckles?
1 Knux can smash through walls that Sonic can't.
2 On the ice block you careen through walls, over pits and through spikes, generally causing mayhem as you travel.
3 Well, it's icy, it's cold and there are those horrible things that make ice cubes out of Sonic or Tails at the boss.
4 Sonic does an amazing leap across a chasm only to slam straight into the wall and plummet down with half a ton of snow.
6 There are those funny platform things that swing from real low to real high to get you up to the top of the level. And they're a pain in the neck to time properly, so it's much easier if you get someone to airlift you as Tails.
Anyhow, that's my guess 
DW
I swear if it IS Icecap, I'm gonna eat my sock.
Nope. But Darkwing has been the closest so far...
Robotnik Winter from Sonic Triple Trouble? (Sonic and Tails 2)
1 - Red is a bigger threat than blue.
Knuckles gives you more trouble than Fang.
2 - GTA: Sonic!!
As Sonic you can get on a snowboard and can defeat the bomb enemies just by dashing into them.
3 - Cold reception.
It's an ice stage.
4 - Look out beeeelooooooow....
There are bottomless pits.. but usually after a short fall strong winds will blow you up again.
5 - NOT from Shadow The Hedgehog
6 - Swing low, sweet chariot...
No clue about this one...
Is it Launch Base from Sonic 3&K?
1) The Knuckles level is much harder than the Sonic one
2) Sonic gets in a Eggmobile.
3) It starts of in the snow from Ice Cap
4) The level ends on the falling Death Egg
6) Those swinging cars and lifts?
Ding ding ding! We have a winnar!
John Taylor gets it with Launch Base from Sonic 3!
1 - Red is a bigger threat than blue.
Knuckles does indeed get a harder level, even having to face multiple bosses!
2 - GTA: Sonic!!
Sonic steals the Eggmobile for an amazing getaway. 
3 - Cold reception.
When you first enter the level, it's from Ice Cap, and the entrance is all icy.
4 - Look out beeeelooooooow....
There's a Battle Ship the size of my ego falling!
5 - NOT from Shadow The Hedgehog
Yep. Self-explanitory this one.
6 - Swing low, sweet chariot...
The swings you grab a hold of swing lower when you grab them.
Johns' go!!
1) Prince of Sonic?
2) Round and around and around.
3) Hidden Route.
Is it Sandopolis Zone?
1) Prince of Sonic?
Prince of Persia reference.. I don't know much about this game at all, but it makes me think of deserts.
2) Round and around and around.
Some of the loops make you go round multiple times before launching you upwards.
3) Hidden Route.
Don't know about this one.. could it be Knuckles' path in act 1?
Nope
Lost World in Sonic Adventure 1?
Lost World seems to be dark and gloomy - a possible Prince of Persia reference.
The snake which you have to jump on, which goes around and around in circles.
The hidden route I am oblivious to.
Nope.
4) Eclipse
It's a level from Sonic Riders, isn't it? There's one with the eclipse.. how is it called? *does a google search*
Dark Desert?
Yes.
1) Well it takes place in a desert city not unlike PoP
2) During the whole Anolog spinning thing your character goes around and around
3) There is a hidden route to the 100 Rings Box at the beginning of the level
4) Well the level starts with a gorgeous eclispe.
Your go now Erika.
1) ZOMG! Breaking a trend!
2) Outward loops
3) The Hammer ver.3
EDIT: Wth is up with the second clue? o_o It just won't show right. It's meant to say outward.
EDIT2: Gah!! x_x O-U-T-W-A-R-D. I don't think that's a swear word now, is it? O_o
Route 99 from Sonic Advance 3
1) It breaks the trend of Green Hill like first zones
2) Yep has them too. Inside outness~!
3) The boss breaks the hammertank, but not the hammer
Your go GT.
Btw, let me try again.. outward, outward, outward.
Wonder if it's going to show right now? 😛
- - -
Alright, lets see if this one is better.
1) closest to pre genocide
2) spin elevator action!
3) tube top troubles...
- - -
Oh and one more thing...
John Taylor: Well, It was a educated guess.
First for Sonicdom not Segadom, Ristar had a music level.
The second and third clues however were like WTD? I can't remember seeing Eggman in Music Plant, Golden Deer? so yah explain those please...
...bonus points to whoever can the figure out why the later 2 clues from my last go were related to Music Plant.
Metropolis Zone from Sonic 2 (Genesis)?
Finally! I made a hard one! ^__^
1) closest to pre genocide - Ruins? I honestly have no clue has this fits.
2) spin elevator action! - The spinning elevators?
3) tube top troubles... - More often then not, when you get the top of those tubes, you get hit by those shark-like jets?
I see no answer Sailor Rose Dust, but I assume you mean Hydrocity Sonic 3? Then no.
Is it Scrap Brain Zone from the original Sonic the Hedgehog (Sega Genesis 16bit)?
Sorry, try again.
Metropolis, from Sonic 2.
1) closest to pre genocide
Sonic 2 Beta had a level called Genocide City. That level seems to be what replaced it.
2) spin elevator action!
You run on top of a giant bolt on a screw to elevate yourself.
3) tube top troubles...
Well, there were warpy tubes there, and usually, ther was the most annoying crabbot in the way. And he was a trouble.
o.o
TTG, GyserHog already guessed Metropolis. :S
As to my guess, it's The Machine from Sonic Spinball.
1) closest to pre genocide
Well, the genocide city concept art that was revealed not long ago resembled this level a lot.
2) spin elevator action!
There are some spinning things, they contain emeralds usually.
3) tube top troubles...
Hmm, there's the risk to drop down all the way again?
The last two clues I'm not really sure about as it's been quite a while since I last played Sonic Spinball..
Erika got it!
1) closest to pre genocide
You pretty much got this right. Back in Sonic 2 there was going to be a zone called Cyber City, but then they renamed it to Genocide City and scrapped it all together. The concept was tossed around elsewhere untill it was used for The Machine. Honestly I'm glad you didn't say "Oh lalala Showdown looks like what Genocide City would of been and The Machine comes before it I will have to say Teh Machine001011"
2) spin elevator action!
I have to mark you off for this one. The spinning emerald containers are -not- elevators, they are spinning emerald containers! I hoped people would for this one think of the various spin elevators of the sonic games where you have to spin on a wheel and it goes up on a track. Most noteably Lava Reef Zone of Sonic 3&K. In The Machine, the track is visible but there is only one and are along the sides, not two and in the open like in Lava Reef. The "vehicle" itself is disguised as a fliper, and you have to hold the fliper up to activate it. I discovered it by accident and thought it was common knowledge. One I found how to use it, The Machine got a heck of a lot easier.
3) tube top troubles
If I included the word ZAP or electricity you would of probally have gotten this one right. Of course I mean the level's boss, where you have to break the tubes located on the top to free the animals.
Your go Erika.
1) Pushable spikes reveal hidden passages!
2) Fire and lightning
3) Swinging Eggman
Flying Battery Zone for S&K. Hands down.
Lol, am I that bad at making clues or are you way too good at guessing? xD
Your go.
- - -
1) enter the fox
2) prawn trap
3) nose!
- - -
Death Egg from Sonic 3 & Knuckles?
Nose makes me think of the giant Eggmech, and how you have to hit it's nose. The other clues make no sense, but meh, I'll see how I go.
Nope.
Is it Aqua Lake Zone from Sonic 2 for the Game Gear?
1) Enter the Fox: Although not playable, this game introduced Tails barely a month before the Genesis title.
2) Prawn Traps: Each Act was full of water and prawn enemies who would swim at Sonic and then retreat.
3) Nose!: The boss was a sea lion who would bounce Sonic on his nose and also blow up balloons(which was his weakness.)
Done and done. Well played Koivo! Your go whenever you're ready 😉
Ok then.
1) We must work together
2) Freeze!
3) Waterslide! Whee.
Cannon's Core in Sonic Adventure 2? You have to work with all six charas (Hero and Dark), time switches freeze everything (cept the player) and there's quite a bit of swimming.
That's gotta be it. Crap. I'm never gonna even get to guess on one of these. =P
Excellent Miss Puar.
Your go.
