Simply beat the first level in the game as Leo. You can also get "Clean Sweep" here.

Beat the second level in the game.

*NOTE* Your playing as “Nightstalker” not “Raph”. So when you do the “Sai Climbing of the wall, don’t expect to get that achievement”.

Beat the 3rd level in the game, You play as “Don” and you will use his “Special Bo Vault” move, which will unlock the “Used Dons Special Move achievement” as soon as you do it. To do the special move, press the  at the correct time, a character will tell you to.

Beat the 4th level in the game, you play as “Mike” and will get “Used Mikes Special Move” achievement when he uses his “Nunchucks” as wings.

Beat the fifth level of the game, you play as “Leonardo” and the first thing you do in the level is “levitate through the bars” which is Leo’s special move, so you will get the achievement for that right away.

Beat the 6th level in the game, you start off as Leo and will quickly unlock “Mike”. In this level you will also unlock “Family Unit”. You will be prompted to double jump in a gap that is too long for you to jump, and will tell you to jump and then click  which will make a brother of yours throw you further to where you want to be, you can also when fighting, hold  with any character and will do a “CO-OP move, which would also unlock the achievement.

Beat the 7th level in the game, you start off as Leo, and will soon unlock all the other characters. In the first bit of the level, there are “electric bolt” traps so be sure to jump over those. No other achievements are unlocked in this mission, besides the level completion one.

Beat the 8th level of the game, in this level you play as Nightstalker (who is really Raph) but when he does the special move, it won’t count for the achievement. Because you’re playing as “Nightstalker” and not “Raph”.

Beat the 9th level of the game, you play as Nightstalker, once again, though he is wearing gold armor this time, as soon as the level starts, baddies appear use the “charge  attack”.

Beat the 10th level in the game, you play as Leo and will unlock the other characters shortly, watch out for the slime! If you fall in you will have to rapidly push  to get out of it.

Beat the 11th level in the game, in this level you will FINALLY receive “Raph's special move” achievement in this level.

Beat the 12th level in the game, in this level you play as Nightstalker. Very straight forward.

Beat the 13th level in the game, you play as Leo, and find out that Raph is really Nightstalker.

Beat the 14th level in the game, you play as Carl with 2 other turtles. You must rescue Leo in this mission.

Beat the 15th level in the game, very easy and straight forward.

You play as all the characters. Here are some tips to beating the last 3 bosses.

1. General Mono (Gorilla)

When he bangs his hammer, jump over (toward, but over) the vibration waves, then jump back. He does this 4-5 times, then tries to jump on top of you. When he goes into this phase, keep running and watch for the little circular black shadow, he won’t hit you when he lands go and whack the crap out of him. (Carl is the best). When you lower his health he falls, then gets up and does a super hammer slam. Do a co-op move with Carl (Swing with Don) and walk towards him. You will not fall of, or go flying. By the time hes done, the co-op partner move with be done. Then, repeat the following steps until he dies.

2. Acid Spitting Woman

One of the easier ones, when she shoots the acid, double jump over her and then do a “grand slam to the ground”. She will then be paralyzed and then whack her with Carl. Repeat these steps and she will be gone in no time.

3. Final Boss

Don’t be worried, he is actually REALLY, REALLY easy. You must use all 4 turtles as a team to defeat him. You will notice that each of his attacks have a "color" to them. Use these colors to determine which turtle to use the special team attack with. He has 4 main attacks and they are countered using the following turtles:

1. When he throws little Orange bolts at you, use Michaelangelo's combo special. Now just try to avoid the Meteor shower.

2. He will shoot Purple laser beams. Use Donatello's special team move. Once again avoid the Meteors.

3. Next he will send flying Red ghosts. Use Raphael's special team move one them.

4. Now you just need to finish him off with Leonardo's special team move.

The “Silver Coins” aren’t the ones needed for your first coin. You must beat a level with “A” rating to unlock the challenge map (easiest to do on level 1). Do the challenge level, and repeat the “story level”. The gold coins will appear very often, get one, and you got the achievement.

Do a co-op move combination attack: Do a co-op move combination attack: Simply press  while in the air when you have at least one other turtle in the upper right on the game.

You will get this achievement while completing level 4: "Cowabunga Carl Getaway". Just jump and press and hold  to do the special move.

You will get this achievement in level 11: "O brother where art thou". Yes you actually do Raph's special move in Vigilantism but because you are nightwatcher you wont get the achievement. Just jump and press and hold  to do the special move.

You will get this achievement in level 5: "Spirit of the Forest". You will get in right after the level start to get out of the cage. Just press and hold  to do the special move.

You will get this achievement in level 3: "Techno Ninjutsu". Dons special move is tricky because you have to aim just right or else you will fall into the pits. Just press and hold  to do the special move.

Complete a level without taking damage: Complete a level without taking damage: Do this on the first level, you will have only two enemy battles and they are relatively few in number, so simply do the jump slam and then hit  when they are on the ground for easy kills. You can even fall into holes (automatic death) and still get this achievement, but you CAN'T fall off a ledge, as it will deal minor damage, so be careful on the wall climbs.