You're looking to create a mod for Arma 3! That's a great project.
If you want a (mil-sim, casual, Star Wars, zombies, etc.), just tell me.
The modding tools provided by Bohemia Interactive, specifically the Terrain Builder and the Object Builder, granted the community the same resources used by the developers. This open-door policy resulted in high-fidelity content that rivals, and often surpasses, official downloadable content (DLC). Total conversion mods did not merely tweak gameplay; they rebuilt the game’s identity. For instance, the Cup (Community Upgrade Project) and CUP Terrains mods imported the entirety of previous ARMA titles into the new engine, preserving decades of content while modernizing it. This preservation ensures that the game serves as a living museum of military simulation history, where players can transition seamlessly from 1980s Cold War scenarios to near-future drone warfare within the same launcher.