Green Lantern: Rise of the Manhunters

All good but there is an easier way of doing this and on your first play through. and that is too use a Second Controller. so basically when you get stuck in a fight or are running low press start on your 2nd pad and bomb and extra guy with full Will bar now just spam a long range attack and rinse and repeat.

The final 3 bosses i cleared first time without dying using this method. just stick one guy right up close to draw the fire and spam attacks with your second pad. then when it runs out swap characters and let that guy die he will respawn after 10 seconds with a full will bar again.

Happy days this will be a full 1000 Gs within 4 hours if you find all the metorites why playing each level.

After beating the game on "Poozer" you can then choose "Emerald Knight" on whatever level you want and play through with all the upgrades. I highly recommend doing it this way to prevent experience grinding (I got the last upgrade on the last level of my Emerald Knight playthrough) and frustration (I only died on the final boss, and only because it took me a while to realize that the best way to kill him was by hitting ring surge and pounding him with the mech's YYY combo)..

Some general tips:

1) Use the mech construct and the gatling gun for the bosses and larger enemies. The mech in particular just burns right through enemy health, especially on the final level. If you can't hit a boss with the mech (this will happen), just spam the gatling gun. It does less damage but when the mech's not an option it's definitey the fastest way to kill them.

2) You can clear entire waves of the smaller enemies with the jet. Do this often and you'll breeze through the game, probably only getting hung up on the two types of enemies who can dodge (just hit them with the ring blaster and dodge frequently yourself).

3) Buy the power battery upgrade that you get after levelling up for the last time (it costs 100,000 points) during your Poozer playthrough. It'll enable you to keep at full ring power throughout the game, and is pretty much a game breaker.

If you need any help or tips with a specific section or boss, just message me and I'll do my best. Good luck! You won't really need it.

I was just going to add this as a comment to the solutions already posted as they are all good tips, but it turned out to be so long that I figured I might as well post it as a full solution. It highlights some of the only difficult areas in emerald knight mode.

Good call on the battery upgrade (@OldChili360). Not game breaking on emerald knight really, but helps facilitate as speedy second playthrough. Two tactics I found very useful that no one mentioned:

1. Your jet throws don't have to hit enemies directly to destroy them. On emerald knight enemies tend to get in your face pretty fast and interrupt the jet attack before you get the throw off, but I found that if you chain dodge away as far as you can get, then just jump and do the jet construct while in air, they will generally just stand there and then your jet will plow through and annihilate everything except for the larger manhunters and the speedy little hoverboard guys. For the larger guys, punch them in the face with the mech, for the hoverboard guys at first I used the ring blaster, but then I found out what I felt to be a better way to handle them and also deal with one other important fight:

2. The rocket pack- with the lantern battery and construct upgrades you can spam the hell out of this and it doesnt matter where you are facing or how far you are really, you will hit the little speedy guys on hoverboards and everything else. This turned out to be amazingly useful vs the last boss fight during the phase where you are still using your normal constructs. He moves around very fast and getting in close can be very painful, and the arms and guys he summons can get quite hectic on emerald knight, but if you have fully upgraded construct damage boost and dodge around spamming the rocket pack it will home in and destroy the arms and hit all the hoverboard guys etc, siphoning in tiny boosts of health from the arms and filling your ring surge meter. And then, when only the boss is there, ALL your rockets will hit him, doing about 3% damage every volley. Just dodge and dodge again, lantern battery a bit when you get a second, but only a second because you'll need to keep dodging, then fire a volley after he does a slam or whatever. When you get a ring surge, get in his face and activate it and spam the hell out of rockets because if you have fully upgraded ring surge guardian you are invulnerable and uninterruptable during surge and your rockets will tear him to shreds.

Lastly, vs the big rock guardian on Zamora, I found the spinning maces to be pretty effective at chipping away at her while not leaving yourself open to much damage. And keep in mind when she slams her hand across the screen to cause the cave ins you can just hold your block shield and you will not take damage from the swipe. Killing the crystals she summons out of the ground can also reward you with small bits of health if you need it, as it can be a somewhat long fight.

I recommend playing through on Emerald Knight your first time through. While there will definitely be points where you will cry foul, hate your life, and curse the developers for certain boss battles and enemy encounters, it's less time consuming than two play throughs. And the achievements stack, so there's no need to play through twice if you don't want (especially if it's a rental and you just want to get through, I did it in about 7ish hours). A few pointers I'd hand out for this difficulty are remember block exists (LB), the mini-gun is your friend, choose upgrades according to your play style (if you mash a lot, Attack branch, If you want to bust out your Surge more often than not Ring Surge Branch, etc), and get all of the meteorites, the last two Missions especially are going to be a kick in the balls without them. Oh, and on bosses, THE MINI-GUN IS YOUR FRIEND!

Something ZeroThreshold just brought to my attention is that if you have a second controller "press start and bring Sinestro to help with boss battles. Use up all of Hal's ring powers, then use Sinestro's. Keep one alive while letting the other die, because when they respawn, they come back with a full ring power meter." While some might frown on the technique, it would have made my life so much easier during the playthrough. Send good vibes to ZeroThreshold for bringing this up.

To get this achievement I recommend doing it on a second playthrough. It will take you almost two playthroughs to get all of the powerups anyways. By doing it in two playthroughs youll be able to increase your powers making things much easier.