Easy trophy. Just fire off a nuke by either already having one or by picking one up if the Support Chopper drops it to you. The drop icon looks just like the trophy icon. This can be done in any mode of the game.

Components of the megalaser are gray in color and will be dropped by the Support Chopper. These are different than normal pickups however because if they touch the ground, they disappear. Simply collect 4 components in a level to complete the megalaser.

Easiest to complete on Mission 1 unless you're actually playing with a friend. You can just turn on a second controller and make sure to fire off some shots here and there.

This is the only 100% online trophy in this game. The online community can be dead sometimes so if you're in need of finding partners, check this thread: Heavy Weapon Boosting Thread

This is basically awarded for completing the first half of the main mission mode. Collect powerups, avoid fire, etc. You shouldn't have any issues with getting through the first half of the game. You have unlimited continues so you're never in danger of losing completely. If your upgrade choices don't work out, you can shift upgrade points around to find something that will work for you.

This amount may seem like a lot, but you'll have this many points around the midpoint of the game. Just continually shoot enemies and this will be attained around Mission 10.

This can be done by yourself or in an online game with up to 3 other players. If doing this by yourself, just remember all the survival techniques for different enemies. The last minute is generally the hardest when reaching the 8 minute mark. If you're doing this online, the other players should make this a walk in the park.

Just be sure that you never use a nuke and if you die, you quit to the main menu and retry. You'll start at that same level and continue on. Completing missions 1-9 is the easiest choice for this trophy. You have to actually complete mission 9 to get the trophy. Some have stated they have to complete mission 10 as well to get the trophy. Keep your eyes on the atomic bombs that the large tan planes drop as if they hit the ground, you die. Those are the biggest hazard while trying to do this.

There are 19 missions in the entire game to complete in order to get this trophy. If you get stuck on a certain level, maybe look at swapping upgrades around to try a different technique. With unlimited continues though, it should be only a matter of time to complete this.

Likely the hardest trophy in the game. Once you complete the main mission mode, this will unlock. It basically requires to you defeat every single boss in the game without dieing. If you die, you have to restart from the beginning. The Support Chopper will drop off upgrades during every transition to another boss.

General Tips: You're not trying for the quickest time so go for the safest route instead. Some bosses have extra guns that you can destroy so there is less chance of you being hit by something. Save your nukes for the last boss.

Go here Heavy Weapon Boss Videos to view the videos. Below I've written up a little text information regarding each boss.

Boss 1 - Twinblade: You can destroy the two missile launchers if you want to. Other than that just avoid the 4 missles and destroy the boss.

Boss 2 - Battleship: You can take out the 4 turrets if you want to. Once they are gone, destroy the center.

Boss 3 - War Blimp: Watch out for the roto mines and the raining fire. The boss will switch back and forth between the 2 attacks. Just keep attacking.

Boss 4 - War Wrecker: Just watch out for the wrecking ball. It is the only form of attack this boss has. Watch the video to learn the pattern.

Boss 5 - Gorillazilla: Try to destroy the missiles he throws out before they explode. If they explode, the release six energy balls you have to avoid. Once he's thrown the missles, he'll jump over to the other side of the screen. Just go underneath him and repeat.

Boss 6 - Eyebot: Destroy the six ends on his tentacles. If one of these lights up, do not stay beneath it. Once they are destroyed, continue to destroy the center while avoiding the standard attack.

Boss 7 - Head Zeppelin: Use your attack spread to eliminate the missiles he shoots out. When he does his bomb sweep, shoot at an angle up and then above you, while moving to the other side. Watch the video to see how.

Boss 8 - Mechworm: Wherever the sand gets disturbed is where this boss is coming up from. Get to the side and attack him while he leaps through the air.

Boss 9 - H-Bot: Destroy his two sides and then keep constant fire on him. He'll shoot some missiles you need to look out for but once he loses his sides, he'll shoot beams from his eyes. They aren't large, but avoid them nonetheless. You'll need to move side to side to avoid his jumps.

Boss 10 - Twinblade: Same as before but has more plasma guns on the side that shoot out.

Boss 11 - Battleship: The turrets will shoot at a quicker speed on this upgraded version. Same technique exists.

Boss 12 - War Blimp: More roto mines are released and the rain of fire is a little more difficult to avoid. Still not hard to get by.

Boss 13 - War Wrecker: When the wrecking ball hits the ground, it will throw up rocks that can damage you. Keep constant fire and stick to the same pattern as before.

Boss 14 - Gorillazilla: Same as before just a different jump pattern. Destroy those missiles to make it easier for you.

Boss 15 - Eyebot: Same as before but just a bit quicker. Same technique applies here.

Boss 16 - Head Zeppelin: Almost the exact same fight. Do what you did for the first one and you'll be perfect.

Boss 17 - Mechworm: Same attacks and technique here. He launches more rocks this time around though.

Boss 18 - H-Bot: Same attacks used here as well. Do what you did before and you're good to go.

Boss 19 - Secret Weapon: Three stage boss fight.
Stage 1: Avoid those lasers at all costs. Use a nuke if you have to and are about to get hit. The lasers can go straight down, cross each other, or cross each other while they wave back and forth.
Stage 2: Stay under him the whole time. Shoot straight up so that you destroy the atomic bombs he drops. If one of them is about to hit the ground, use a nuke. The only other attack he does here are pink plasma shots.
Stage 3: Easiest stage. Shoot him and the homing missiles that get close to you.

Just like "Cockroach of Freedom," this trophy can be gotten by yourself or online. Getting up to 12 minutes by yourself gets very intense, so if you struggle then just go online and get 3 other players to help you out. It is much easier to survive online for 12 minutes.

This can be done in mission mode or online. If trying to do this in mission mode, try the missions from about Mission 16 and later. Probably the easiest place to get this though is by playing online survival and just using a nuke when the screen is full of enemies.

The Supply Chopper is the white helicopter that drops powerups/pickups throughout the missions. They take quite a bit of fire so just keep at it. A nuke will not destroy it; only normal fire will.