Firstoff, this may be a long read for some. I've included things like tips, tricks and foibles I've come across as it pertains to the gameplay while doing what this whole thread is about. If you want to skip ahead to the meat of it, feel free. If you're new to this game and would like some pre-playin' blah blah or you can't sleep and need to doze off, keep reading.
There are, on certain levels, some items that can be duplicated via various means. Doing these glitches to duplicate said items can give you more Med Packs and money to aid in the progression of the game and/or gaining certain achievements. Not all items can be duplicated, it appears only a very few can. Doing any of these glitches requires a certain amount of effort from the player by moving an outlined item on specific levels to a certain position, running somewhere or tripping a save point and returning to the item location. Again, most of the found dupable items are outlined below.
This guide was compiled after researching multiple posts, threads and You Tube videos so I could do the glitching myself. An observation was noted that there were at times confusion and/or problems getting the glitching to work for some gamers. I tried to make this a complete how-to and informational resource to help those who are having trouble with these glitches. this guide has also been updated with contributions to this thread.
These glitches in my guide were done on the XBOX 360 version of the game. It appears that these glitches seem to also work on other platforms as well. One thing I will not be condoning nor discussing is the use of a Trainer for the PC/Windows version of the game. Using that is blatant cheating.
There are players out there who are purists when it comes to playing games. Of which they may frown upon the exploitation of glitches, seeing it as a form of cheating. They are perfectly entitled to their opinion. My only request is if you are just going to bash this thread, please don't. This thread is meant to help those who choose to use it. If you got through the game without any glitching, you're better at this game than I am.
This first post in this thread is tailored towards info and general guidelines which seems to work across the board with 5 known Chapters (Four of which were verified on the 360 version by myself) you can glitch on. Following that will be the Chapter specific instructions and videos. It's kind of a long read but it may answer most of your questions.
Do not Save your game in the middle of glitching and do not pick up items into your inventory until you are ready to. The reason is it appears that each item has a specific game Item ID. If you pick up that item into inventory, including a duplicated one, it will register that it was picked up for that current save. If you then save and reload the same save the game will think you have picked it up. You will need to Kinesis-grab the items while duplicating them so you'll have multiple ID items on-screen at once.
Additionally, you will see in the guide that after moving most of the first move of an item to be duplicated, you will be instructed to Save your game. A little contradictory but this will set the duplication point for most of the items. And when you start to dupe you will have 1 plus the first move item in the exact same spot. It's a glitch remember, don't over think it. =)
When you are ready to start a respective Chapter glitch, SAVE your game to a couple of slots BEFORE you start moving items around. This is so if the duplication seems to have stopped way before it should have, a simple reload can get you started again. A couple of reasons it may have stopped are because an accidental item inventory pick-up during a Kinesis-hold or the glitch glitched on you.
And another thing about Saving. You can safely Save to several Save slots without fear of screwing up any "On the same save" achievements like Maxed out. The "Same Save" term refers to the Round you are playing on the skill level you initially started playing on. When you are done with the last Chapter (12) and are prompted to save, do so. Then load that "Completed" game to start anew (on the same skill level but Round 2) with all the stats and inventory from the previous save...
Keep a Node or 2 in your inventory. Some of these glitches require you to use a Node to access Node rooms. It was noticed too that on Chapter 4, for example, every time you walk up to the door it may ask you to use another Node to open/unlock the door. Using another Node is NOT necessary! Just step back a tad and the icon will change. Every Node door throughout the game only requires 1 Node to open, period!
Also you can go online to the XBOX Live Marketplace and purchase a Level 5 suit (I recommend the TANK suit with 60% armor) and DL the Heavy Damage weapons too. This will open up all 25 inventory slots and give you a weapon damage boost to boot.
The maximum amount of actual Store usable credits you may have at any given time is 999,999. For items that you still have that you want to sell, put them in the Safe and sell later as needed. Anything you sell after a million is wasted and will not count. After the Chapter 3 glitch, watch how much you spend and have room for a potential full take of 630K on Chapter 4. Otherwise you'll waste cash.
Buy a bunch of Nodes for 10K each at the Store and upgrade most of your suit and whatever guns you like at a Bench. Don't waste Nodes on empty Node holes unless you need to fill them to reach other upgrades. Blank Node holes do NOTHING except bridge the path to other upgrades.
Some players have posted that no matter what they try, duplicating the items did not work. Someone stated there might have been a 2nd run of this game that had patched this ability(?) but as of yet is unconfirmed. Although I played the game entirely offline and got all of them to work, I loaded the game while online to check for an Xbox Live patch. None loaded when the game booted and I started a test game. If there was a patch for my version of the game it would have downloaded long before starting a new game.
Updated Feb 19th, 2010: I just realized that I played the gray boxed Platinum version of the game, so it's probably safe to say it's NOT a first run burning. So if this dupe glitch just won't work for you, I'm at a loss. GL!
Updated Oct 11th, 2010: Added intro paragraph on what duplication glitching is as suggested by Tyger7. Also added a Chapter 2 3K Credit Bill video and description excerpt supplied by qoob in this thread.
Updated June 26th, 2011: Added a Chapter 2 10K Bill dupe description and videos supplied by halopriest. Also added an alternate method for the Chapter 3 5K Bill which allows for a Med Pack to dupe as well from JuSt BLaZe.
This was posted in this thread by qoob to dupe a 3K Credit Bill. I have not verified this for the 360 version because I don't own the game anymore. The Video below for the PS3 version looks legit enough to add to the guide.
"As soon as you get out of the monorail you get your Kinesis upgrade. After you pushed the boxes away you will come to a big room where 3000 credits are inside. Don't pick them up because you can duplicate them . Open the door on the right side of the save point, grab the credits with your kinesis and go down the hallway until the credits disappear. Go back up the hallway and back through the door to the save point and once again through the same door. The credits should now be floating in mid-air. Grab them from a distance and shoot them against the wall (on the side where the corpses are).Go down to the point where the credits are floating and then go back up the ramp to the corpse by the door and you should here a sound, the credits in mid-air are back again. You just have to go up and down and repeat the last steps..."
"When you enter the vacuum you have to get the 10.000 credits first. Therefor run to the other door but don't walk through it yet, instead turn right an watch a corpse passing by (from right to left). A little left to the corpse you can see the credits...
"Grab the money from outer space with kinesis and carry it back from where you came from. Drop it in the small room and save. Now grab the credits drop them at the save station, walk to the elvator [sic] and back to the room with the credits."
At the bottom of the shaft, where you have to go through the fast moving door which requires Stasis to slow down. Ignore the Node door to the right of this Stasis door at this time. Go through the Stasis door, kill the baddies and reach the Save Point. SAVE to 2 or 3 slots. Go back down the ramp, down the hallway and through the Stasis door. Use a Node to open the door. Kinesis-grab the 5,000 Credit bill and return the the Stasis door. Drop the bill, slow the door then Kinesis-grab the bill again and carry it through. Drop the 5K bill on the tile before the hallway drops down about a foot (I believe it's the 4 tile).
Return to the Save Point and Save to one of your save slots. It is OK to save this first move to set the duplication respawn point. Now, walk down to where you dropped it, Kinesis-grab it and move it to the 3rd tile. The first time you'll probably see another 5K already there, move that one there too. I wouldn't Kinesis-throw it here as you might loose it through the floor. After moving it return to the Save Point but do NOT activate it. Just let the icon change. Go back down and to-do, another 5K! Note that if you run back up and down from the save point you will probably see the cash respawn.
Keep doing this until it stops. If it seems like it stopped duplicating early because either you picked up the bill by accident into your inventory or the glitch got glitched, this is where that duplicate save you did on another slot comes in handy. Reload the save where you have to go back through the Stasis door and start over. For the full 630K it'll probably take you about an hour and change. Save when you're all done.
Also note, for this Chapter and only this one, the audio goes wonky the longer you have been glitching the cash (on the XBOX 360 I know anyway). Just keep going until you are done. Save the game, then quit entirely. Reload the game, then that last save, and the audio will be back to normal. Now use this money to upgrade your suit, Kinesis and Stasis when you reach the next Store and Bench. Also some weapons if you like.
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