These are all the achievements related to the main story of David.

Game Mechanics
- You must wait for the yellow square to grow from David before you can shoot.
- Only shots that are inside David's circle can be fired
- Shots are fired towards the mouse cursor
- Shots have a specific time limit before they grey out and become ineffective.

Difficulties
Okay: This is the basic level giving you full health.
Very: This is the hard level giving you just one point of health. You die in one hit.

Finished Intro
You know the basics, now put them to work.
- Simply follow the directions given in the tutorials and complete the tutorials to the end. Hitting escape to skip the tutorials will result in missing this achievement.
https://www.youtube.com/watch?v=Asc2OVbtnQc

Greed on Very
I'm proud of you. <3
- This is the most straightforward level of them all, simply dodge the blocks coming towards you and completely destroy the enemy.
https://www.youtube.com/watch?v=KAneLZ6Qor4

Anger on Very
Yeah right!
- This is your introduction to the speed burst types. The glowing shard will charge up and shoot towards you. Simply take it out first while gradually kiting the rest of the hoard. (There is a hidden achievement to the left. Will be explained in the miscellaneous section)
https://www.youtube.com/watch?v=El5OSWOIC2I

Wolf on Very
WUPHF
- The special ability of the wolf stage is that the enemy has a regenerating shield which resembles a square. You'll need to perform quick shots to take down its shield then deal damage directly to the enemy before the shield regenerates. Repeat until you've taken out both enemies.
https://www.youtube.com/watch?v=OLiRPb1c8MY

Anxt on Very
V Anxt Wow
- This is the first track level for David. You cannot cross the blue lines and there will be giant attacking squares rising from the enemy. The key is being able to fend off the incoming squares while navigating the track. The best way is to get more than one kill per shot, so aim so that your shots will ricochet off the enemy and hit other enemies. Once you exit the track, I recommend falling to the right. The end of the track has you on the left going right, so most of the squares will be on the left.
https://www.youtube.com/watch?v=5p36CGxtM48

Lies on Very
yes no yes no
- There are two stages to this level. You first have to eliminate the red enemy to the right. That enemy can shoot through the white blocks and will aim at you while equaling your vertical position. You need to destroy a path of white blocks to get to him. Once you've finished that, the second part begins where you eliminate the enemy that has been shooting the homing missiles at you. My strategy to this level is to create a cavern inside the blocks because the homing missiles cannot go through the white blocks. This way, you can focus just on the red enemy. Be careful of the homing missiles, they can still kill after you beat the level.
https://www.youtube.com/watch?v=vLaJ5qXlc5E

Brood on Very
"THE SCARY SHARK LEVEL"
- As the description suggests, the enemy imitates a shark. You cannot shoot your bullets into the water, so you must lure the shark out of the water. I find hugging the walls easily brings up the shark. Shoot it when it rises, rinse, repeat until dead.
https://www.youtube.com/watch?v=mdafXZP-Mqk

Flee on Very
Sorry about this one. ;)
- This is fairly annoying if you have terrible precision with controlling David. The good part about this stage is that there are no random elements, so you're simply mastering a track then killing the enemy that's been chasing you the entire time. The first part is straight forward, control your jumps and keep your pace. When you get to the drop, use your shot attempt to slow the clock down to dodge the red rectangles on the way down. Once down, simply dodge the rotating bar and hit the gold diamond to retrieve your bullets and take down the enemy chasing you.
https://www.youtube.com/watch?v=iNPp11Sme-4

Pride on Very
pew pew pew!
- This stage is fairly easy provided you can maintain dodging the entire time. You are limited towards the bottom of the stage and have to await for the enemy to continually drop down so you can take him out. You can take out some of the missiles on the end if you need to to lessen the amount of bombardment the enemy has, but this is not required.
https://www.youtube.com/watch?v=ot9N3ta5kNY

Sin on Very/Sin on Okay
Here, have a "hat"!/I SEE RED.
- This is the final boss level. The target are his eyes and there are 5 targets to each eye, so you have to land 10 hits before you defeat him. The hardest part of this stage is dodging his attacks. Everytime you destroy an eye, he will spray a circle set of diamonds. Either go into the crease that he doesn't aim at, or you'll have to make a hole so you can sneak through. Use slow-mo as much as possible. His other attack is sending homing blocks at you. After a while, these blocks will lose momentum and kind of sit idle at the bottom.

Doing this on very, will unlock the okay achievement simultaneously.

To the right, you'll see a door labeled 'MOAR' and as it suggests, there are more levels that you can play. The three bonus stages each have an achievement for beating it on Very difficulty.

Stray on Very
where did dey go?
- The challenge for this level is that your shots will be spread out and will not return to you and you can only hit one target at a time. The first three you want to go for are the homing missiles that spawn above you. Once you get rid of those 3, the rest is easy.
https://www.youtube.com/watch?v=p5odWpWP5Wk

Drag on Very
no no no no no...
- Probably the easiest level in the entire game, similar to the shark level, you just have to use the semicircles as cover and attack relentlessly. You cannot hit the ceiling. Nothing tricky.
https://www.youtube.com/watch?v=RNT-HfzOk1Y

Flood on Very
IT'S RAININ, MEN.
- A fairly annoying level and the final track level. As you can see, you'll have to navigate the entire track going in a useless loop to get to the top where the umbrella cloud is. For the most part, the rain comes in sets, so be careful to wait or attack the sets so you can pass easier. The faster you move, the easier it'll be. Once you get to the top, shoot the rod to finish the stage.
https://www.youtube.com/watch?v=dWeKUjCTwNM

Pent on Very
007 status dodgin them lazerz.
- This is another obstacle course that you have to conquer. Use the gold platform to shield yourself from the colored attacks. You'll also need to use the slow-mo to your advantage as you'll have to weave above and below the gold platform to successfully navigate. Once you get through all the lasers, killing both enemies should be easy.
https://www.youtube.com/watch?v=NnEmVGWwF44

Coil on Very
Sneaky snakes sneakin.
- There are three coil enemies in the area and you have to destroy each of them. They each have two stages: the first stage is where they're attached to a snake-like body. After hitting the head once, the body will turn red and remain motionless cutting off the parts of the map you can't go to. The second stage is their head becomes detached and you have to hit the head again. Kill all three to finish.
https://www.youtube.com/watch?v=LrL0_Oi1L3c

Found the Super Secret Basket-Ballpit Gate!
Le vull to too two tutu. Bah tum left. aunt op THE ROCK IS COOKIN'.
- The secret is located on Level 2, Angry on Very Difficulty. You do not have to kill the enemy to use the door, but the outline will not be visible. Rainbow particles will emit from the bottom of the door. Enter that door to enter the Super Secret Basket-Ballpit. Enjoy!
Credit to Lylat for informing me of this.
Credit to YouTube user Lincoln Davis for informing me about the door access prior to killing the enemy.
https://www.youtube.com/watch?v=7p3b3BL6CJ8

Found the Secret Tape!
L8r sk8r.
- This new hidden zone is located within the new bonus level, Pent. Inside pent are several lines of color attacks. At the very end, where the last line goes to the bottom right before you fight the actual enemy, you should see there is a vertical line in the pattern of the colored lines. That's one of the edges of the door.
Credit to Viper for finding it first.
https://www.youtube.com/watch?v=q82LlyhI-Ro

The Arena is located above the bonus area.

100 in Arena
You're rich!

In the Arena, three types of enemies will spawn. The regular blocks, the homing missiles, and the sporadic splitters. Each are worth 1 point each. The easiest one to kill are the splitters since you only have to hit them once. Then the regular blocks, then the homing missiles.

Enemies drop two in-game power-ups
Solid Square: This is 1 health for David.
Hollow Square: This creates a rotating square field that will decimate enemies for a period of time.

There are three power-ups and the amount of credits you get are based on your high score.
Attack - This increases the amount of bullets that circle David.
Health - This increases your initial health in the Arena stage.
Shield - This increases your shield charge per attempt.

There are also two special attacks that are worth 50 credits a piece, so you can imagine they're pretty nice. Right-click to use Blink.
Wand - I don't know what it's called, but it's called wand now. And it makes your bullets big and the ability to pierce multiple targets making your shots much more effective.
Blink - You can teleport where your cursor is infinitely, helpful for getting out of a pinch.

I feel that getting Blink is too much of a sacrifice if you're going for 100 points, but the wand move could replace attack rather effectively.

Arena Build - Suggested by Lylat
You do not need the health power-up at all, because you can earn health in-game and don't want to waste your limited credits on it.
You'll want a balance of attack and shield. I ended up with 19 shots and 20 shield before surpassing the 100 mark in Arena. 19 shots is plenty, while any additional shields is just added support, so if you keep earning more credits closing in on 100, I'd place them into shields.











Knife to a Gun Fight
Get 10 points in Arena with 1 HP, 1 Ammo, 0 Shield, and no upgrades.
- The conditions only pertain to the start of the level and if you have no upgrades then you should only have 1 hp, 1 ammo and no shields. During the arena stage, you can pick up health power-ups as well as the spinning shield power-up. Get to 10 points, then die for the achievement.
https://www.youtube.com/watch?v=NQBTIgMLkL0

Shoulda Chose VERY
- It seems this achievement may be broken due to the fact I only played two very stages in Pent and Coil then exited to the main area and the achievement popped. So there is a possibility that any stage completion without taking damage will suffice.