Here is a strategic level guide to help you survive through the game. Cooperation is the key to make this achievement a bit easier! If you don't have a mic, you can PM the boosting players about this guide before the boosting session so they can study it. Remember you have 20 lives, so use them wisely to beat the game without dying. Levels will often have pizzas you or your other teammates can grab if they/you are low on lives or health.
Level 1 (April's Loft):
This level is the easiest in the game. Just watch out for the boulders that come down after passing the stairs and be careful when attacking the enemies, so you won't waste 2-4 lives here. While fighting Rocksteady, a strategy to use is attack, then go back, then attack, then go back to avoid losing more health here.
Level 2 (Streets):
This level has more enemies than in the previous level, as you might notice in multiplayer. There is a sign which can drop down and hit you, which spawns in two more enemies to deal with, so be careful where it lands. Use the same boss tip from Level 1, but when Bebop uses his laser gun, go up or down to avoid his shots.
Level 3 (Sewer):
This level can be much easier to complete by using a glitch. On the sewer sidewalk, stand near the edge. This glitch would allow you to become practically invincible to enemies unless you make a different step up or down. As you notice you are on the edge, rockets don't come out of the sewer to attack you. The only thing that will hurt you during the glitch is the spiky wall. Baxter can be defeated in two ways, by defeating all his robots or defeating him while using the glitch by doing
attacks while still on the edge without moving your control stick/D-Pad.
This level has now more enemies with weapons (such as spears and guns), so keep a bit distance from them before they fire and wait until the good moment to attack them. You can use the cones and barrels which one-hit kill enemies within the barrels' explosion radius to help you defeat some of the enemies. The level's boss includes a rematch with Bebop and Rocksteady together, so it's recommended to split up the players to defeat the other two.
Best to stay up at the very top of the highway throughout the level since most vehicles won't damage you and your teammates. At the end of the level, avoid the spikes when battling the three final Foot Soldiers (that throw tires).
Like Level 3, there is a glitch which makes this level easier to complete with losing less health and lives. When the red choppers come at the start of the level, destroy them. When the enemies on skateboards spawn, DO NOT attack or kill them, or the glitch won't work. Just jump over and avoid the enemies for about 5 or more minutes (depends on the connectivity and speed of the game) and then kill them after 5 or more minutes has been passed.
Remember how I suggested to split up while defeating Bebop and Rocksteady for Level 4? Well, you kinda do the same at the start of this level, where one team defeats the robots and the other one defeats the other Foot Soldiers. You can do the same glitch in level 3 (standing on the edge) near the area with the set of lasers. When you get to the robot flies' area, quickly destroy them using
attacks as they are very annoying and can make you lose a lot of health while struggling to fight with them. A tip for the boss fight is to attack him from the up/down of him when he gets close, so he has a lesser chance of striking his flamethrower at you. Grab a pizza if you need it here.
Since this is the last level of the game, you have a less chance of your health being healed, as there are only a few pizzas at the end of the first area before you fight Krang and Shredder. Avoid the Freeze traps as they take a bunch of health and destroy the laser cannons as quickly as possible. Jump over the boulders after the Freeze traps. Before the boss fight, Traag will slam the door which would make it go flying, which can lose your health, so watch out for that. Use the same strategy with Level 7's boss (attacking him from the up/down of him when he gets close).
Level 8.1 (Krang):
This is the final part of the game where you have 0 chances of getting your health healed by pizzas or completing a level. Don and/or Leo is recommended for this fight since they both have long-ranged attacks so they can attack, step back, attack, step back, and vice versa.
Level 8.2 (Shredder):
This is it, the final boss of the game. Shredder uses his clones to confuse the players, and he has two attacks; his beam which one-hit kills you, or a sword slash attack. To identify the real Shredder, after all but one Shredder's helmets came off. Plus, Shredder's clones can have their helmets knocked off in several hits. When he charges his beam attack, you have only about a second to dodge it.