Lord Zedd

Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Version:
NoTU
Mythic TU3
TU3
Each patch features:
- No RSA checks
- All armor unlocked
- AI is enabled MP, courtesy of AMD
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- All skulls unlocked
- You can now spawn any AI through effects instead of just creatures
- BLF size limit increased from xC000 to x1C000

Landing gears and cargo door are down/open with no driver, up/closed otherwise (no collision on closed door however)*
All but 2 seats work (but you probably didn't know they even existed anyway)
Gunner is first person. (try it out!)*
Seat animations are the best Spire has to offer.
Enter Pilot/Gun from the inside. (Left side is Gunner, Right is Pilot)*
Falcon Menu in Forge:
Block 1x1: Default Pelican with Turret
Block 2x2: Default Pelican without Turret
Block 3x3: Damaged Pelican with Turret
Block 4x4: Damaged Pelican without Turret
*Personal Touches that didn't normally exist for a Pelican.

So I finally managed to get it working.
So in development, 343 used a special lobby, "pve_development_only_custom", in order to test Spartan Ops locally. As seen in the Halo 4 Beta, pve_dev was a slightly modified Reach firefight lobby.
By injecting the level select and gametype select UIs and modifying them, I managed to get only so far, because assigning pve_dev a screen and trying to visit it crashes the game. I tried a few things, such as not assigning pve_dev and simply "backing out" to it, which kept me in the same lobby I backed out from, but presumably as pve_dev. It always kicked me back to the lobby after the countdown I gave up for a bit.
Recently I thought to crash it with Visual Studio attached. Luckily enough, it told me about an exception getting thrown. Investigating that exception, I found a switch case that doesn't catch values past 0xC (theater). pve_dev happens to be 0xE, which means it was reading an instruction as an address, and therefore crashing. At the expense of some matchmaking lobby code (you guys don't need it, right?) I wrote up some code to catch 0xD/0xE and send them to the campaign code. It worked!
Because it's using the campaign lobby code, it isn't perfect but that cannot be helped with the original code missing like it is.
That said, I researched CUI a bit and cleaned everything up to be more presentable, including a custom lobby, "final" strings for FFGT missions and mapinfos, injected the 1.5 missions, and added proper blfs for every map.
As a last-minute addition, I figured out how pck files are loaded and added paths so that all spops/dlc sounds will work, granted you have the pck files for them (not included). Here is a screengrab of my English(US) folder to use as a guide http://i.imgur.com/yFyZpxc.png
What this rar has:
the mainmenu patch
the xex patch for TU7 (which works just like my other xex patches)
modified mapinfos and blfs for all 15 maps.

What you need to supply yourself:
clean disc xex
tu7 patch files
the spops maps from disc 2
the 1.5 spops maps from XBL (or wherever, but its free so why not get it from the source?)

If you know what to do with them and don't want to go through patching, here are the xex changes (TU7)
At x826777B8, x826777C0, and x826777C8 - Change each to x826778C8, which will set up a change to the matchmaking lobby code, giving us free space
At x826778C8 - Change to x397F00075563003A, this is is to finish the above, just a copy of the other lobbies' code
At x8267778C - Change to x48000084, this is the "hook" for the switch case so we can catch pve_dev's value
At x82677810 - Change to x2B1E000C57C0103A4199FFC84BFFFF74, this applies the shift that we overwrote to branch here, then checks values greater than xC, and sends them to the campaign code, anything else returns to the original switch
All done!
This mod has been tested over system link and appears to work fine.
I do not guarantee the accuracy of these internal FFGT Spartan Ops gametypes. The missions I've played appear to work fine.
When starting the game, make sure the map matches the name in parenthesis in the mission name. If they do not match the game will load but nothing will happen and you won't be able to spawn.
Bugs/Issues:
This mod does not cooperate with mainmenu_patch.map. While it is possible to fix, the _patch map has its own strings so every gametype is blank. To work around this, simply add rename "mainmenu_patch.map" in the games root. onyx_patch and onyx_spops_patch should work fine.
The lobby resets on every instance, which is due to it using the campaign lobby code. Every time you back out or finish a game the gametype will clear and the map will get set to Prologue
The gametype list is limited to 32 items, whereas there are 50 spops missions, therefore only episodes 1-5 show by default and 6-10 need to be poked. Poke 0xBE54ED1C to the offset 0xBE54CA78. Or in Assembly, change the address of the "Spartan Ops Variants" block in multiplayer\game_engine_settings_new.wezr to 0xBE54ED1C.
As mentioned above, there will be no sounds unless you have the corresponding .pck files, which again look like this http://i.imgur.com/yFyZpxc.png
Not all gametype options may work, which is an engine thing.

Usage:
Patch mainmenu.map with Assembly
patch default.xex with the included batch file
backup your spops mapinfos
copy the info and images folder to your maps folder, it will overwrite your existing mapinfos
copy your .pck files to your "\sounds\English(US)" folder or equivalent
rename "mainmenu_patch.map" in the root if you have it

Ingame, simply chose Spartan Ops from the Infinity Menu and you'll be in. Choose a mission, then select the matching map found in the gametype's name, and enjoy some offline Spartan Ops!
Mirror: http://www.mediafire.com/download/5iwi0tl57is5vjj/offline_spops.rar
Screenshots:
http://i.imgur.com/UXgYnub.jpg
http://i.imgur.com/Cu03Bab.jpg
http://i.imgur.com/KHukM4N.jpg

All the fine features from Reach's "Blue Flames" xex but in Halo 4!
Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Versions:
nonTU
TU7
Each patch features:
- Checks removed
- Full armory unlock, including loadout stuff, emblems, stances, and specializations
- Disc 2 install bypassed
- Campaign can make films again
- Allows net debug text to display
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked

Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Versions:
nonTU
TU1
Anniversary TU1
Each patch features:
- Checks removed
- Full armory unlock, including DLC and "Eternal" Blue Flames
- No CEA map prioritizing on map list (TU1/Anniversary Only)
- AI is enabled MP, courtesy of AMD
- Nightvision enabled in MP
- Allows net debug text to display
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- You can now spawn any AI through effects instead of just creatures

Created by hand based off the Halo 3 and Halo 4 gint tags. Just inject the .tagc and add your hlmt reference and you should be good to go.
Tags included:
objects\giants\scarab\scarab.gint
camera\scarab_d_camera.trak

Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Versions:
nonTU
TU1
Anniversary TU1
Each patch features:
- Checks removed
- Full armory unlock, including DLC and "Eternal" Blue Flames
- No CEA map prioritizing on map list (TU1/Anniversary Only)
- AI is enabled MP, courtesy of AMD
- Nightvision enabled in MP
- Allows net debug text to display
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- You can now spawn any AI through effects instead of just creatures

Landing gears and cargo door are down/open with no driver, up/closed otherwise (no collision on closed door however)*
All but 2 seats work (but you probably didn't know they even existed anyway)
Gunner is first person. (try it out!)*
Seat animations are the best Spire has to offer.
Enter Pilot/Gun from the inside. (Left side is Gunner, Right is Pilot)*
Falcon Menu in Forge:
Block 1x1: Default Pelican with Turret
Block 2x2: Default Pelican without Turret
Block 3x3: Damaged Pelican with Turret
Block 4x4: Damaged Pelican without Turret
*Personal Touches that didn't normally exist for a Pelican.

The Flood have touched down in New Mombasa, and your team is all that is left.
Requires the Map ID 8188 to be added to your game's .campaign file, as well as the latest ODST xex that unlock all missions.
Final filename should be "outbreak.map".
This mod includes every flood form from Halo 3, including the cut banger infection, as well as a more-powerful human form for infected players and an infected engineer.
Third Person can be turned on and off with d-pad down and d-pad up, respectively.
Only real issue is that the Infection Forms tend to count towards the wave ai counter, so if a wave isn't ending you will need to go hunting for them.
Mirror: http://www.mediafire.com/download/ju9valdz9np1xms/outbreak.rar

Extract the archive, copy your clean default.xex to the extracted folder, and run the batch file. Follow any instructions it gives you and it will spit out a modded XEX! READ THE README.
Features:
- Checks removed
- All armor unlocked
- AI is enabled in MP
- VISR enabled in MP
- No global local player limit
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- Firefight missions always unlocked (Note: the achievements for "Complete Campaign on N/H/L" will never pop due to how the ff missions are checked. If you want them then load a clean xex)
- You can now spawn any AI through effects instead of just creatures
- BLF size limit increased from xC000 to x1C000
- Default lobby list items updated to accommodate my mainmenu mod.

Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Version:
NoTU
Mythic TU3
TU3
Each patch features:
- No RSA checks
- All armor unlocked
- AI is enabled MP, courtesy of AMD
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- All skulls unlocked
- You can now spawn any AI through effects instead of just creatures
- BLF size limit increased from xC000 to x1C000

A program I made a while back and forgot about. Lets you poke a variety of gametypes to the Halo Reach Pre/Beta. You normally had to use the "Atlas" build of Assembly but it kinda died and it's a hassle to boot up just for gametypes anyway.
Dev kernel/xbdm will be necessary for things to work, as well as a copy of xdevkit.dll in the program directory. Find it in your 360 sdk installation or probably some other modding program that included it when it shouldn't have.

Extract the archive, copy your clean default.xex to the extracted folder, and run the batch file. Follow any instructions it gives you and it will spit out a modded XEX! READ THE README.
Features:
- Checks removed
- All armor unlocked
- AI is enabled in MP
- VISR enabled in MP
- No global local player limit
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- Firefight missions always unlocked (Note: the achievements for "Complete Campaign on N/H/L" will never pop due to how the ff missions are checked. If you want them then load a clean xex)
- You can now spawn any AI through effects instead of just creatures
- BLF size limit increased from xC000 to x1C000
- Default lobby list items updated to accommodate my mainmenu mod.

All the fine features from Reach's "Blue Flames" xex but in Halo 4!
Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Versions:
nonTU
TU7
Each patch features:
- Checks removed
- Full armory unlock, including loadout stuff, emblems, stances, and specializations
- Disc 2 install bypassed
- Campaign can make films again
- Allows net debug text to display
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked

A program I made a while back and forgot about. Lets you poke a variety of gametypes to the Halo Reach Pre/Beta. You normally had to use the "Atlas" build of Assembly but it kinda died and it's a hassle to boot up just for gametypes anyway.
Dev kernel/xbdm will be necessary for things to work, as well as a copy of xdevkit.dll in the program directory. Find it in your 360 sdk installation or probably some other modding program that included it when it shouldn't have.

Version 4.1: I fixed a string and lobby list positioning, if you downloaded version 4 you should patch again with this one!
Adds custom games and forge lobbies with proper formatting to accommodate, now with working game options. This updated xex is recommended to fix the mp lobbies defaulting to options instead of start game on load.
CURRENT BUGS:
None? Previous carnage report crash issue is on map makers to fix.

A fun project turned into public patch.
Features CUSC and RAIN editing.

Created by hand based off the Halo 3 and Halo 4 gint tags. Just inject the .tagc and add your hlmt reference and you should be good to go.
Tags included:
objects\giants\scarab\scarab.gint
camera\scarab_d_camera.trak

The Flood have touched down in New Mombasa, and your team is all that is left.
Requires the Map ID 8188 to be added to your game's .campaign file, as well as the latest ODST xex that unlock all missions.
Final filename should be "outbreak.map".
This mod includes every flood form from Halo 3, including the cut banger infection, as well as a more-powerful human form for infected players and an infected engineer.
Third Person can be turned on and off with d-pad down and d-pad up, respectively.
Only real issue is that the Infection Forms tend to count towards the wave ai counter, so if a wave isn't ending you will need to go hunting for them.
Mirror: http://www.mediafire.com/download/ju9valdz9np1xms/outbreak.rar

Extract the folder from the rar, add in your default.xex, and run the batch file.

Download the archive(s) you wish to use and copy the necessary files to the extracted directory. READ THE README.
Versions:
nonTU
TU1
Anniversary TU1
Each patch features:
- Checks removed
- Full armory unlock, including DLC and "Eternal" Blue Flames
- No CEA map prioritizing on map list (TU1/Anniversary Only)
- AI is enabled MP, courtesy of AMD
- Nightvision enabled in MP
- Allows net debug text to display
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- You can now spawn any AI through effects instead of just creatures

A patch of the mainmenu used in the following video:
http://www.youtube.com/watch?v=fGnE7Ii11XE
*Note: Your spartan will only look the way it does in this mainmenu, this will not transfer to retail, etc etc etc*

If you downloaded the Reach PPFs you'll know what to do. If not:
Extract the archive, copy your clean Beta default.xex to the extracted folder, and run the batch file. Follow any instructions it gives you and it will spit out an unlocked XEX!
Choice of nonTU and TU2.
Features:
-Beta fully unlocked
-Checks removed
-AI enabled in MP
-You can now spawn any AI through effects instead of just creatures

Version 4.1: I fixed a string and lobby list positioning, if you downloaded version 4 you should patch again with this one!
Adds custom games and forge lobbies with proper formatting to accommodate, now with working game options. This updated xex is recommended to fix the mp lobbies defaulting to options instead of start game on load.
CURRENT BUGS:
None? Previous carnage report crash issue is on map makers to fix.

Extract the archive, copy your clean default.xex to the extracted folder, and run the batch file. Follow any instructions it gives you and it will spit out a modded XEX! READ THE README.
Features:
- Checks removed
- All armor unlocked
- AI is enabled in MP
- VISR enabled in MP
- No global local player limit
- No local player limits on campaign and theater
- Campaign missions and rally points always unlocked
- Firefight missions always unlocked (Note: the achievements for "Complete Campaign on N/H/L" will never pop due to how the ff missions are checked. If you want them then load a clean xex)
- You can now spawn any AI through effects instead of just creatures
- BLF size limit increased from xC000 to x1C000
- Default lobby list items updated to accommodate my mainmenu mod.