Arma 3

Arma 3

2,242 ratings
Operation: TREBUCHET
File Size
3,420.264 MB
Sep 24, 2016 @ 4:28pm
May 18 @ 10:18pm
7 Change Notes ( view )

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Operation: TREBUCHET


Operation: TREBUCHET (OPTRE) was the last major UNSC offensive against the human insurrection before the first contact with the Covenant empire. Our mod will focus on the struggles of the common soldier rather than the elite spartan warriors, allowing you to experience the Halo universe from a new, brutal perspective. OPTRE is a total modification with the intent to bring the popular Halo Universe into a more realistic setting by introducing it into Arma 3.



OPTRE features a variety of infantry equipment, vehicles and aircraft. To name a few examples:
  • MA5 Assault Rifle Family
  • M52 Body Armor
  • ODST Battle Armor
  • AV-14 Attack VTOL "Hornet"
  • UH-144 "Falcon"
  • GA-TL1 "Longsword"
  • M12 Light Reconnaissance Vehicle "Warthog"
  • M808 Main Battle Tank "Scorpion"
  • LAU-65D Missile Pod
and more...

For access to some of the WIP content that hasn't quite made it to the main branch yet, you can check out OPTRE_Z here:


If you want to get in contact with us or the OPTRE community in general we highly recommend joining our Discord[] or one of the communication channels linked on the right.


The work contained in this distribution is licensed under the Creative Commons Attribution-NonCommercial-NoDerivativs 3.0 Unported License. Please note that the above mentioned agreement gives the right to Article 2 Studios to waiver any of the conditions, therefore you can contact Article 2 Studios to obtain permission to modify our work.

It is forbidden to redistribute the content of this package by itself, or as part of another distribution, using the Steam Workshop by anyone other than Article 2 Studios.

You may not use the material for commercial purposes. This includes running this package on server instances that employ any monetization schemes, including, but not limited to, donate-reward systems. Bohemia Interactive's approval of your monetization scheme does not grant you rights to wave this clause.


Halo© Microsoft Corporation. Operation Trebuchet was created under Microsoft's "Game Content Usage Rules" using assets from Halo, and it is not endorsed by or affiliated with Microsoft.

Game Content Usage Rules[]
Popular Discussions View All (10)
May 19 @ 2:12pm
PINNED: Found a bug? POST IT HERE (v0.19)
Article 2 Studios
May 8 @ 3:51pm
OPTRE Community Public Server now live!
Apr 11 @ 12:40pm
Red/blue spartan armor
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Lasket May 19 @ 5:00am 
So, it seems that you need to be a passenger to be launched in the pods in the HEV module. Because of that, using the HEV drop pods with AI seems rather complicated atm (either you send 2 people in one pod which seems awkward, or you send 2 people in and get the driver out again)

Could you maybe fix it so that "drivers" also get launched via the module and not just passengers?
KingBeano May 16 @ 7:21pm 
did they add the hud to the mjolnir helmets
SGT.FreemⒶn May 16 @ 6:09am 
@Republic Command There IS a mod from the same team with those dudes called OPTRE: First Contact but from my memory focus has been fully shifted to this.
Gryff May 16 @ 4:42am 
@Republic Command

If you'd believe it, a mod called Operation Trebuchet focuses mostly on Operation Trebuchet.
Tracker May 16 @ 1:52am 
Will there be Covenant soon?
Slurpable Boi May 14 @ 11:17pm 
how do you use jetpack for odst bullfrog
talayton2016 May 14 @ 10:22am 
I had the same problem, I don't know why they would take it down
Nov May 13 @ 11:54am 
Anyone know what happened to the Insurrection+ mod? I had three missions that required that mod, and it seemingly vanished from the workshop.
Vexcord May 13 @ 11:31am 
Hold shift and the list key (The key used to turn the hud on) It can occasionally be a bit stingy and refuse to open but it still opens.
Al Gore May 13 @ 6:47am 
Where is the key binding for HUD in the settings now? It's totally dissapeared.