Borderlands: Game of the Year Edition

Story related, can't be missed.

There are two parts to this battle, as you'll have to destroy the Mega Interplanetary Ninja Assassin Claptrap (MINAC) before you can take down the Interplanetary Ninja Assassin Claptrap (INAC). This foe is armed with a mass of Gun Turrets and will shoot lasers from its red eye, so it is VERY important to stay in cover and take shots at it from there - running out in the open will result in a very quick death.

As soon as the battle starts, run behind the overturned bus and stay there – this will be your cover for the entire fight. This is a particularly good place to hide, as most of the Exploding Claptraps will not be able to get you here. You need to aim for the giant red eye of the MINAC in order to deal any damage to it. Peek you head out of cover and shoot the eye (scoped weapons are more accurate, at long distance so you may wish to consider using these.) You don't need to worry too much about destroying all of the turrets, but you may wish to take out a few of them to make things a little easier. If you decide to do this, then the Missile Turret located just below the MINAC's eye should be your main priority, as it can cause substantial damage to your character and in some cases, instant death (thanks to Terminator for this tip.) A scoped weapon is ideal for destroying the turrets, as it is a lot more accurate at the long range from which you will be firing from.

You'll notice that the red eye will sometimes be shielded, at which point you cannot hit it so conserve your ammo at this point. When shooting the eye, always make sure that you look around, as there may be some sneaky exploding Claptraps that got through and are out to get you. These are extremely dangerous and will cause instant death in some cases, so you really need to take them seriously and destroy them before they get too close. Always check your radar to see if there are any in the vicinity. If you are damaged either by the Claptraps or the MINAC, then stay behind the bus and wait for your shield to regenerate (you may also wish to use some Health Vials if your character doesn't have the regenarative health property).

After you have destroyed the MINAC, the INAC will emerge. He should now be the only enemy on the battlefield so it will be completely safe to emerge from your cover and fight him in the open. I actually recommend doing this, as if you get trapped in a corner with the INAC, he will deal some serious damage. Keep on the move when shooting him and jump to avoid his attacks. A corrosive weapon will make light work of his armour. When he's down, you will obtain the trophy.