Save the Ninja Clan

There is definetelly an easy way if you are having trouble on level 10 as I was:

1- Start straight from the 1st boss and win the race (this firts battle is very easy);
2- Hit next level: You´ll in the 2nd world;
3- Return to the the 1st world using the portal (do not exit to main menu);
4- Start from level 1 and keep going until level 9;
5- As soon as you finish level 9 the achievement will pop;

This is my first solution here, so I´ll be glad to hear comments about it.

Video Guide:

NOTE: In the video I collected each collectible in the levels. You DO NOT need to do this while going for the Battle Hardened and The Legend achievements.


Text Guide:
The easiest place to unlock this achievement is in world 1. Start on Level 1: Tutorial and work through each level as carefully as you can and without dying till you reach the boss of world 1. (So levels 1-10 must be completed).

Most of the worlds are simple with a bit of practice at the best way to do them, but there are some things to note.

1. "Secret" exits to the next levels DO NOT COUNT, you MUST get the scroll in each level as normal.
2. All 10 levels must be completed in one go. You CANNOT quit out of a level and come back later, and you cannot replay the same level 10 times for the achievement.
3. There is no time limit, taking your time in some of the earlier levels is worth it.
4. Know your levels. Levels 1 - 9 are very easy to complete, practice doing the ones you might struggle with and choose the best route. Level 10 can be tougher due to the heat seeking missiles on the rail throughout the level, but timing is everything.

My strategy was since level 9 was the hardest for me, I started at level 10, then used Mad Vicente's guide the rest of the way. You just want to start on the level after the hardest one for you, then keep going until you reach World 2, then jump back through the portal to World 1 and go to level one and you'll only need to make it to the level before the hardest one for you.

By this logic if you so desired and find all of the bosses easy, you could do the second boss first and then go to your desired level and follow the above steps to skip any 2 consecutive levels in the first world or you could do all 3 bosses and skip 3 levels. (Needs confirmation)

Also, a quick note, if you beat the game with the secret ending you unlock the ability to freely switch between all 3 ninjas if you're finding this that difficult.

Level 10 is super easy. Just jump on the platform to the left of the rocket and wait for it to come down. When down, jump up and kill the guy. Then jump back down onto that same platform. Wait for the rocket to reach the top.... you get the idea.

Also it must be noted you cant use secret exits to get past levels.

Level 1- Fairly simple nothing to be explained

Level 2- Fairly simple just kill the guy when you climb the wall and take your time when vaulting over the saws

Level 3- Try to follow how I do the beginning with all the saws. Easiest way I found to get around those. After that when you vault over the wall jump quite a bit away from the enemy but not to far so the rocket attacks you. Dodge the bullet he shots at you and kill him. After that continue forward and jump over the rocket. Last part is fairly simple since you can take your time on it. Just follow the path I take and this level should be done easily.

Level 4- You can either jump on the trampoline like I did or just jump double over to the wall. Make sure you wait for the saws to be at the bottom. Then jump to the one next to it. Shoot the box to the right of you to make sure you make the jump incase you miss it. Then take your time on the saws and blades. On the second block stay still and wait for the blade to go under the block and jump up and try to shoot the bad guy. If you dont do it at that point he can shoot at you and you might not be fast enough to shoot the bullet and shoot him. After that the level is coimpleted.

Level 5- Beginning is pretty simple just jump your way across avoiding the blades. Then you have to jump up the wall with your darts. After that just jump across to the end. Avoid the bad guy as he wont be able to kill you so no need of killing him. Just get to the scroll and you move onto Level 6.

Level 6- This level can be difficult if you dont like to be pressured. If you dont move fast enough the blades that are chasing you will kill you. First thing first is shoot the box straight away. SINGLE JUMP to the blade that you put on the box. If you double jump like I did you might hit the grenade thats going in your direction. After it passes you jump up on the block and pass the cannon. Avoid the enemy in the next spot or kill him quickly. Your choice. After that your just jumping to the end.

Level 7- This one can be easy or difficult. The good part is that its dark so you have to be a bit closer to your enemy for them to shoot at you. At the beginning before jumping on top of the explosives just shoot the guy. I found myself dying alot on the part after that. What you do is stand back a bit like I do. Then shoot two darts as soon as possible. The reason for this if you dont get the timing in your jump atleast you'll be able to land on your dart. DO NOT ATTEMPT TO KILL THE GUY BELOW YOU. Either A you will most likely die. or B he will shoot the explosives and you cant get across. Just jump on the explosives and you should be fine. Once you get on the explosives shoot a dart forward so it kills the guy with the RPG. I accidently shot two but don't do that. After you kill him you will have to shoot at the explosives so you can make a opening to the end. Make sure you dont just wait around or else the explosives below your feet will explode and you will fall into the water.

Level 8- First bit of the level would be best to watch how I get around the saws. Once you land on the blocks with spikes on the left side shoot a dart where the blade is going up and down. Once the blade goes below your dart just jump over there and climb up the wall. Then fall down to the launcher that will launch you to another launcher. After the second launcher make sure you are moving your analog stick to the right to avoid the the guy with the rocket launcher and to make your way to the scroll at the end.

Level 9- DO NOT double jump straight away. Take a half second between each jump. The next part with the sand blocks would best if you watch the video instead of me explaining it. Once you pass that part the next area you have to be careful. These blocks also disappear. If you use too many of these blocks you won't be able to walk back. Walk over to the end and hit the switch. Now make your way back and go to the scroll that was previously locked.

Level 10- This is the hardest level if not done quickly. This level is based on speed and being careful not deleting all the blocks. Rockets also clear the block they hit. When you get close to the top make sure you go to the right side. Reason why is because it gives you time to block the bullet he shoots at you and get time to kill him. Then fall through the left side and fall down and hit the switch on the buttom. Now if you were careful the first time going up you should have enough blocks to go back up. Make sure at the end you go up through the left side since you should have more blocks to make it all the way up. Once you beat this the achievement should pop up after you load into the boss fight. The boss fight is NOT needed for the achievement.

That's the tips for the Save the Ninja Clan - The Legend achievement