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that's why I need an UPK unpacker for this game.

I cant make one myself because I'm not a advance programmer,
Only a beginner... so if any one have an UPK unpacker for this
game plz do share.

id like to see Class mods hacked so i can hack that team skill cooldown percent

Using the program from DoctorWho's link allowed me to edit weapon mods very easily. I've been digging around in the 2K Games\Gearbox Software\Borderlands\WillowGame\Localization\INT directory and found that it contains all (???) the weapon mods you can insert.

So far what I've found:

Each weapon type has its own localization file that conveniently lists weapon-specific mods for title and prefix. However there are mods you can use listed in other files located in gd_weap_names_shared.INT and gd_weap_shared_materialparts.INT .. there's probably more but this is what I've found in about 5-6 minutes of digging.

Here's an example of a simple edit:

If you were to edit your support machinegun you would go to gd_weap_support_machinegun.INT and look at the mods.

Let's say I saw:

[Prefix.Prefix_Damage1_Shattering WeaponNamePartDefinition]
PartName="Shattering"

I know this is a prefix so I go and open the save editor and go to Weapons->Prefix. My gun currently has gd_weap_support_machinegun.Prefix.Prefix_Kick1_Glorious. So I would take Prefix.Prefix_Damage1_Shattering and place it after the weapon type "gd_weap_support_machinegun" to make it look like "gd_weap_support_machinegun.Prefix.Prefix.Prefix_Damage1_Shattering"

Another example: if you wanted to edit the weapon material you would look at gd_shared_materialparts.INT and replace in a likewise manner. If your gun currently has gd_weap_shared_materialparts.ManufacturerMaterials.Material_Maliwan_2 and saw something like

[Material.chameleon WeaponPartDefinition]
PartName=" Madness"

you would put "Material.chameleon" after "gd_weap_shared_materialparts." and it should look like "gd_weap_shared_materialparts.Material.chameleon"

This is a very rough guide...you can dig around even more and come up with crazy new guns. I wish I knew how to change the weapon level, etc.

Sorry if this is repost, enjoy! You can easily apply this to other items like your shields, etc

[Edited by egyan, 10/31/2009 3:25:41 AM]

There is no need for me to post everything I know. The character editor at blog.gib.me is capable of changing almost everything I know how to change. There are only two things it doesn't say it does that I know about.

The first is changing an item's level. The final line of ASCII for an item has "title" in it. Here is an example: "gd_weap_combat_shotgun.Title.TitleM_Dahl1_Bulldog"
The sixth position after it contains the item's level. Valid range is 0 to 5. Changing it to a 5 (hex) makes the item level 48 and increases all of the stats to that level. I have done this with my Mercenary mod with ammo regen and it worked. I found it at level 20ish and haven't seen another one since, so the upgrade to ammo regen was nice.

Example:
d...o...g
6c 64 6f 00 06 00 00 00 04
That 4 is the one you would want to change to a 5 for increased damage and other stats. The dots were added to line up the text with the corresponding hex.

The other thing I have learned how to do is change your character's completed quests. All starting at the 18th position after the final item contains your quest information. If you have a character that has completed the game and want to apply that to a level one, just copy and paste it.

You will also need to unlock playthrough 2. To do this, change the 22nd position after your class name to a 1. This can be found at the beginning of the file. Look for "gd_lilith.Character.CharacterClass_Lilith"

I am not sure how the game changes your save data when you complete playthrough 2 yet. I am working on doing that so I can compare files.

[Edited by Syntax42, 10/31/2009 7:17:03 AM]

hey syntax, do you know how to change the weapon's rarity?

the savefiles are so easy to manipulate
I can make Alien weapons that doesn't exist (or they do?)
combining the cannon with the thunder and so on...
about the lvl of the item I already knew about it.
well for rarity will need some search I think
its the itemgrade which is impossible for me to know cuz I
can't unpack UPK files... all other stuff can be easily accessed
and changed with out bugging the char.

upk files are just unreal package files. the unreal extract.exe works just fine on them. Can't remember where I got it offhand and you can't attach files to posts but I'm sure googling will yield results for you.

found somthing going to try it soon.
if I succed extracting and getting the info I need
I will start testing it out and if I get any luck creating
items I will make a program that gives you the desired item.
(but you will still need to have the savegame editor cuz i cant
make one myself)