Metal Slug 3

Complete mission 5, THE FINAL MISSION! Without losing a single life. This can be done in single player or co-op.

This is it, this is the ULTIMATE TEST!! This level alone makes the rest of the game look like a walk in the park. Practice is obviously the key here, plus grabbing the vehicles when you can, concentrating and staying focused!

Another probably not amazingly helpful tip would be to clear the level in very small sections while following the video carefully so then you know what to expect. Even then the amount of fire you come under in this level is insane, but it can be done... eventually!

Personally i found most of the mission pretty easy, at the start you can choose from the Jet (Slug Flyer) or the Helicopter (Slug Copter). I chose the Flyer because using the cannon is a lot easier for me as it only fires forward and diagonally forward which is handy for when you need to move back and fire. The Copter fires backwards when you move backwards making it tough to move back and shoot forward at the same time.

As for the first mini boss (Allen O'Neil) who will be stood out of the side of the enemy blue plane, dont be shy with your cannon/grenades. Allen is the last 'form' of the plane, to start with it will shoot at you with homing missiles and bouncing explosives. Also a standard soldier will pop out trying to hit you with slow rockets, but so long as you are hitting the plane with tons of fire it will go down eventually regardless of wether Allen is attacking or not.

Once past the galaga style part of the level you will enter the main spaceship, this is the hardest part in my opinion! Follow the video for guidance and take your time with the first section, dont forget to free Hyakutaro Ichimonji as he has a pretty useful fireball attack that can help against the enemies! If you didn't free him in Mission 4 than this achievement will still unlock upon freeing him in this Mission: Further on in this same section, you will need Hyak' to free the President before walking through the door. Follow the video from 1.55 and you will see Hyak' firing at the roof, resulting in the President being freed and this achievement popping if you didn't free the President in Mission 2: The rest of the mission comes down to practice and consistency, its seriously tough. But with enough practice and knowledge of the enemies you can do it!

Heres the video that may help a bit!

Best of luck!

(Credit to ex76823 for Part 1, 2 and 4-6)
(Credit to BLK0134 for Part 3)

I've also made my own set of videos too which will hopefully help players out even more!

I just want to add some of the sticky points. Everything up to entering the ship should be ok after you get the hang of it. First I use the plane cuz its easier to avoid the bombs, esp when they come from above, and i constantly use every helicopter. When your character gets captured, that part is not bad when you know what to expect. The annoying part is the aliens when you try to kill them and they're overlapping their ship and you cant shoot em. Next part is easy too when you learn it.

Next when you're in the ship these are some things I learned.

On easy, dont get they Haduken guy. You can use your pistol to take care of the robot but when the aliens come, you want to save the fire gun and the Haduken guy always saves him and you get it too early. You need the fire gun for the brown aliens once you know their pattern, and mostly for the robots at the end.

Then the giant spider robot things. VERY annoying VERY random. The 3rd small one drops either a L or D, and I think once i got a C (Laser, Drop shot, Enemy Chaser). Laser is obviously best. The first robot dude you can glitch to not appear in the video above. The next two should be easy with the mobile satellite (takes close to 100, while you're shooting) and if you stand as far left as you can while still hitting the robot with your pistol, it should fall and not hit you. The 2nd one you should leave a little room to walk in the middle of the screen so you can jump away since its green things are random.

The next part isnt too bad, make sure you always duck just in case (the clones have a pistol I think). Hop in the slug and the rest is just like the video. After the big spider the green things only damage the slug, not when it falls. Then 3 robots in the front, 2 in the back and 1 in the front again.

The next section, follows just like the video.

When you get to the last part, theres 1 zombie and the door. Then you kill the next 3 zombies and get the door. The last zombie has bombs, so crouch and wait to get them. Kill any zombies that come after you then take care of the door. Next you got the 3 zombies, and the one jumping clone dude. I hop in the Vector and get to the door. The key i realized is that you should just barely see the nodes for the door. If you do this the zombies wont come, just the clones. Kill these assholes because they're annoying with shotguns/rocket launchers. If you lose 1 gun you'll be ok, if you lose both its a lot harder but not impossible.

Next part its easy just like in the video. The 2nd robot drops a D, and you DONT want that (you should have a fire gun from the 1st jumping clone you saw). So use your bombs to kill the zombies. Time it right because their vomit CAN hit you. And dont be shy with em. Then continue to the last door. This is what I do, (altho when i got this I didnt hah). Explode your vector cannon on the door, and take out the 2 bottom nodes. Then it should be about 3 fire shots for the top node. Of course watch out for annoying zombies but if you've got fire it'll be fine. BEWARE!!! When you explode the vector cannon to duck cuz you are vulnerable. When I got my Continue achieve, thats the only place i died. I jumped out and as I was falling i got hit with vomit. Very frustrating.

If everything went well, you should have 27 fire and 15ish grenades.
To kill rootmars on easy, throw all your grenades first and then it'll take about 20 fire bullets i think? And thats it.

If you lost your vector cannon, and you jump in the other slug, it'll use your fire. Just use your fire to kill the robots and when the zombies come use the jump out glitch to avoid vomit. I accidentally got the dropshot and used it as much as I could. When I got to the last door I kamakazied the slug for the bottom 2 nodes, and used my pistol on the top one. Also using my grenades to kill advancing zombies, cuz thats really hard.

When I got the achievement I ONLY had pistol and 8 grenades. So you better be really good at fighting rootmars using that slug trick. And I believe unless you got a super fast trigger finger or shoot a red orb to get a better weapon, it'll be almost impossible beating him with just the pistol. I beat him with 6 seconds left on the clock, and at the end I was panicking and was using the slug. So make sure you use the slug cannon too against him.

Its not impossible, but just MUCH harder.