Much of this update was focused on cleaning up the D20 system to allow easier submod creation.
OPAEX V11:
Weapons
+Ma5B Barrier gun (only available via D20 drop or scripting)
+Ma5B FusionCoil gun (only available via D20 drop or scripting)

Other/Bug fixes
+Made a debug mode for OPAEX logging.
+Made all logging and error displays appear only during debug mode.
+Skeleton swapping options should no longer disappear in dedicated server environments.
+Rewrote the D20 roll selection to better support submods.
+Rewrote the D20 fire handler for better optimization.
+Fixed D20 red shell failing to find nonnull players in some MP environments.
+Fixed sideenemy causing issues with D20 spartan spawns.
+Fixed D20 debug mode referring to OPAEX_fnc_StringToFunction as having invalid input parameters incorrectly.

Functions added/changed:
+Updated OPAEX_fnc_D20Roll_SpawnVehicle and OPAEX_fnc_D20_SpawnUnit to support all objects inheriting from Man instead of CAMan, thus allowing animals to work.
+OPAEX_fnc_CopyPasteObjectMotion
+OPAEX_fnc_CopyPasteObjectMotionWithOffset
+D20Roll_Sofa
+D20Roll_Animal
+D20Roll_Carrier
+D20Roll_Destroyer
+D20Roll_Submarine
+Added trains to D20 truck-kun roll event.
+D20Roll_DropGear
+D20Roll_FireTeamFriendly_UNSC (in all default camos)
+D20Roll_FireTeamHostile_UNSC (in all default camos)
+D20Roll_DropFusionCoilGun
+D20Roll_DropBarrierGun
+D20Roll_APCFriendlyOryx
+D20Roll_APCEnemyOryx
+D20Roll_IlluminationBomb
+D20Roll_Cryobomb
+D20Roll_DisruptionBomb

OPAEX V10:
Vehicle changes:
+Removed OPAEX_Scorpion PBO due to OPTRE integration.
+2-Gauge warthog now uses random patterns for shotgun spread and spreads in a 3-degree cone rather than the old 5-degrees.

Weapon changes:
+Removed the OPAEX launchers and ammunition due to OPTRE integration. This means that OPAEX_SPNKR PBO is gone.
+Removed OPTRE launcher changes due to OPTRE integration.
+Removed all impact grenade launcher rounds due to OPTRE integration.
+Removed all OPAEX copies of OPTRE aircraft weapons due to OPRTE integration.
+Reduced spartan laser speed to 1 km/s. This also means range is now 1km maximum.
+Massively reduced spartan laser penetration to help decrease overpenatration issues for light armor and infantry.

Functions added:
+RemoteSystemChat
+GetHighestRankingUnit
+GetHighestRankingAI
+GetHighestRankingPlayer
+GetNextScoringPlayer
+D20_SpawnClusterD20
+D20Roll_BlueShell
+D20Roll_RedShell
+D20Roll_ClusterD20
+D20Roll_TruckKun
+D20Roll_BananaMan

Bugs fixed:
+Spartan laser overpens everything or just outright ignores infantry.
+Spartan laser effect appears to be incorrectly spawning in certain MP situations.
+Pelican sensors were limited to 4km range. (Thank you to red#9433 for idenfication, verification, and fixing of bug.)
+Scorpion main gun not firing.
+Spartan laser has no default ammo load for some reason.

OPAEX V9:
Skeleton-swapping system
+CBA option to disable/enable swapping functionality

Vehicle adjustments
+Added pylons to the falcon

Weapons
+Added cursed D20 grenade, blame InfernoPlus' cursed halo for this one.
Seriously though, there are 46 current functions invokable by this grenade and it is absolutely cursed.
+Added CBA options for D20, mainly for enabling the grenade, which is disabled by default.

OPAEX v8.5:

+Added a module for the illumination bomb

+VTOL Pelican
+VTOL Sparrowhawk

+Readded the missing server keys

+Fixed: Jackknives not appearing on the sparrowhawk

OPAEX v8:
+Add default loadouts to hornet.
+Add default loadouts to pelican.
+Add default loadouts to sparrowhawk.
+Added 1x AGM502 option for loadouts.
+Added Illumination flare bomb, (Mk127).
+Added illumination bomb to pelican temporarily until B-65 is integrated into OPTRE.
+Add ANVIL II IR rockets
+Fix ANVIL I rockets occasionally breaking
+Fix C2GMLS not guiding on sparrowhawk
+Fixed G-meter script for HUDs running on every airvehicle unnecessarily.

+Removed overspeed warning for pelicans

+Reduced damage of C2GMLS from OPTRE's 400 to 50 to reflect the small warhead.
+Changed C2GMLS to proximity fuse.

+Made glassing beam compatible for Zeus.
+Changed the appearance of the beam through light attenuation.
+Blue beam variant

+Disruptor Bomb Module
+Cryo Bomb Module

+Warthog with a 2-gauge shotgun for a turret (blame Tycus for this one)

+Spartan laser now has 3 burst settings.
+Fixed Spartan Laser effect being clientside only.

+Skeleton swapping system for going between spartans and nonspartans. (Multiplayer compatible!)
It appears that event handlers registered to the player will have to be reregistered. Unfortunately, no method exists for this purpose. Retrieving eventhandler code from the player unit and reapplying it to the new unit cannot be done.

A lot of functions were added this update:
+PasteUnitGear.sqf
+ClearUnitGear.sqf
+GetUnitIDInGroup.sqf
+GetSkeleton.sqf
+SwapPlayerUnit.sqf
+SwapPlayerSkeleton.sqf
+SkeletonSwapHandlers.sqf
+ServerInit_SkeletonSwapHandlers.sqf
+PasteObjectVariables.sqf
+HasEventHandler.sqf
+GetScriptedHandlerList.sqf
+DrawBoundingBox.sqf
+GetBoundingBoxDimensions.sqf
+GetBoundingBoxTopCenter.sqf
+GetBoundingBoxWorld.sqf
+IsBoundingBoxContained.sqf
+TimedDrawBoundingBox.sqf
+ArmMk127.sqf
+CryoBomb.sqf
+CryoBomb_ClientEffects.sqf
+CryoBomb_ServerEffects.sqf
+DisruptorBomb.sqf
+EMP.sqf
+SubStringInUnitGear.sqf
+CryoBomb_module.sqf
+DisruptorBomb_module.sqf
+CryoBomb_WeaponMethod.sqf

+Added ANVIL-III SALH rockets.
+Reorganized the aircraft weapon, magazine, and ammo classnames and introduced an OPAEX_AirCore.pbo.

+Made SPNKR have 100 thrust instead of 10 to make up for low speeds after maneuvering.
+Made SPNKR seekers all have maximum range of 2500. This means the SALH and SACLOS have been reduced from 4 km to 2.5 km max range.

+Added Sparrowhawk HUD
+Added Pylons to Sparrowhawk
+Added Sparrowhawk Innie version (in texture lists) temporarily until OPTRE updates their Sparrowhawks
+Added pylon models from the hiddenselections to the A, B, and C versions of the Sparrowhawk

+Fixed all hornets giving an error
+Fixed Scorpions not having gunner seat due to new update
+Fixed assault rifles breaking without the ACE compat

+Reduced the fuse distance of impact grenades from 60 to 0, meaning it will always detonate.

OPAEX V6
+Fix scorpion turret reticule missing.

+Fix spartan laser causing heat damage to user.
+Increased strength of spartan laser
+Thanks to innumerable requests, the SPNKR will have its own OPAEX version and the vanilla magazines and launchers will return untouched.
+No more recoil on the Spartan laser.
+Convert the spartan laser to use magwells instead of magazines to fix SPNKR rounds being loadable.

+Fixed a bug with the Falcon hull hit values

Hotfix for Glassing beam being binarized.

+Falcon HUD

+Added smoke dispensers to scorpion

+Added SACLOS M41 missiles.
+Reworked the Thermal M41 missiles to actually track consistently.

+Added glassing beam module with options! (Thanks to DarkLordAinsley and Nekro)

+Fixed missile detection and countermeasures in standard hornet.