Heavy Weapon

Update 10-4-2017 It seems that the Sandworm boss can kill you when he blows up after you have killed him, this seems to screw with the achievement somehow as multiple users have reported it.

Okay! This achievement can be very tough if you don't go about it in the right way. First off, let me confirm what others above me have assumed.

CAUTION*** Do NOT exit game if you lose a life or if you use a nuke. This will negate the achievement, instead, simply lose all your lives intentionally before the level ends and then use the "RETRY" option. When using the retry option the game voids anything that was done on this level and starts you at the start of your current level.

Now that that is out of the way lets go about with what you CAN do. The key factor to this achievement is what upgrades you get 1st. Unlike what others have said the game does not get more difficult based on what kind of upgrades you use your points on. I am usually someone who goes for defensive stuff but this game is all about attacking, so here is a list of what upgrades you should get upon completion of each level.

Level 1 completed- Guided Missile
Level 2 completed- Laser
Level 3 completed- Unguided Missile
Level 4 completed- Unguided Missile #2
Level 5 completed- Guided Missile #2
Level 6 completed- Unguided Missile #3
Level 7 completed- Guided Missile #3
Level 8 completed- Laser #2
Level 9 completed- Laser #3

At this point you've purchased all the important stuff, the Flak Cannon and the lightning are near useless until they get to Level 3 upgrade. The Shield can save your life, but only has about a 50% chance to do so once its upgraded to Level 3 and it doesn't stop Laser based attacks EVER, so knock that down to a 35% chance to at Level 3. I chose Shield because even a chance is worth it just in case some goon gets a lucky hit in on you.

Level 10 completed- Shield
Level 11 completed- Shield #2

Despite what the achievement says, you have to complete 12 missions and meet the requirements, instead of 11. This during your entire time that is the maximum amount of upgrades you can have and that is the path I took and the one I found that works best.

Tips: It didn't get tough for me until Mission 8 and 9. but its easier again at Mission 10 and 11.If you see a "Fat Bomber", the dudes with the Nukes, then ignore everything and focus on those Nukes, with your firepower following my path, this should be no problem. Remember to stay at the far right of the screen or far left, it seemed much better for me rather than staying in the center of the screen. Be aware of your "one-hit-kill-enemies": Nuke Bombers, Satalites, and Bulldozers. Every other enemy kills you in 2 hits with out shields, it takes more hits to kill you if you have shields. Since you can't use Nukes and you can't die, then "Mega-Laser" has become your best friend. It seems the chance of you getting more Mega-laser parts is based on how many enemies you kill, I have gotten as many as 3 Mega-Lasers in 1 level before. When you get the Mega-laser, don't go all crazy with it, swipe the screen once then wait, flick it at the incoming enemies rather than HOLDING it. By using it this way you will conserve energy, it still will deplete but it will last slightly longer.

I think that's pretty complete, if I missed anything or you think I made a mistake then PLEASE comment as explain the situation rather than just giving me negative feedback. I will quickly fix the problem and all will be well, thanks!!

This achievement description isn't exactly accurate in what it needs you to do, I can only tell you what I had to do to make this unlock.

I got mine after completing wave 12 without dying. It is important that if you lose a life to immediately kill yourself and select the retry option. Do not quit out and come back in - believe me, I've tried that and no achievement, so it looks like it has to be completed in one session.

Also don't upgrade your weapons above level 2 - the strength of the enemy seems to increase somewhat if you go up to level 3, making levels 10/11/12 really hard to do, I found it significantly easier only leveling up to 2. You also need to learn to take out the nuke planes by shooting the bomb with your bullets and the plane with the laser, as on the later levels 2 will come at you at once if you aren't quick enough and then there is a good chance you will screw yourself.

Not a solution but it will help you and answer to Erndawwg dashboard question.

I just got this cheevo over a few days. Just quit to menu and ended game when I got bored. It still popped at the end of 11 for me ;)

Hope this helps people not tearing their hair out in one sitting.

Mission 12 is required for this achievement and it is REALLY HARD.

The best setup I've found to do mission 12 is this:

3 Shield ///// 2 Rockets
2 Homing Missile ///// 0 Flak Cannon
2 Laser ///// 2 Thunderstrike

this might sound like a conspiracy theory, but after grinding mission 12 for about 5 hours, the game decided to give me 2 of the same waves in a row for a couple games, maybe the RNG-esus had too much pity for me, or maybe it's coded intentionally.

anyways, this setup / video was helpful enough to go finish it on the first try with the loadout.


for those who just want text:

3 shield, 1 guided rocket, 3 laser, 2 unguided rockets, 1 thunderstrike.

hope this helps you out.