Command Ops 2 Mods Official
If you cannot find the scenario you want, Command Ops 2 provides a powerful editor to build it yourself.
Once you have the essentials, you are ready for the "tectonic" mods. These change the theater of war entirely.
For the visual purists, the Command Ops 2 forums are a treasure trove of aesthetic upgrades.
These are paid DLCs that fundamentally change the game data and maps.