Mass Effect: Opposition is one in a series of mods of the OPPOSITION Team mods .
This mod will get you into the universe of the Mass Effect and let you enjoy a cosmic adventure.
Adding Local mods (i.e. not Steam Workshop) to the Arma3 Launcher (BIS)
To add mods from alternative sources, first download the mod and unpack it using WinRAR (or similar) then place the @modname folder in either your My Documents\Arma3 folder or in C:\Program Files (x86)\Steam\steamapps\common\Arma 3.
Each local mod must have its own folder and ideally follow a consistent naming convention.
To help differentiate mods from vanilla Arma3 content - local mod folders have an @ prefix i.e. @CAF or @RHSUSAF. To add a local (non SW) mod to the Launcher click on the [ ]+Local mod icon (top lhs) - then browse to the folder for the mod you want to add.
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Note: The !Workshop folder in C:\Program Files (x86)\Steam\steamapps\common\Arma 3 at the top of the list in the image above. Do not delete or change this folder. This folder contains virtual links to each of the SW mods you have subscribed to and is managed by the Steam client / Arma3 Launcher.
The newly added local mod will now appear in the Launcher mod listing.
Some local mods have a "userconfig" folder, copy it into the Arma3 equivalent folder, usually: "C:\Program Files (x86)\Steam\steamapps\common\Arma 3\userconfig". If there is a key in the mod Keys folder place the key file into the C:\Program Files (x86)\Steam\steamapps\common\Arma 3\Keys folder. The key is used if you run a server.
Updating a local mod requires you to manually download the update then remove the old mod version - then repeat the above process for adding a local mod.
