There are 3 groups Blufor, Opfor and Independent. Blufor and Opfor are against each other and work as teams. As independent you can ally with somebody withing the indie group or you can fight against everyone, your choice. Your goal is to capture all the teritories. Except PVP there are also missions, where you can get money and guns.
Except these missions, you can find on the server also other missions that are being added over time such as Patrol Ops, Liberation, Escapes from different locations, Dynamic Combat OPS, Dynamic Patrol OPS and more.
Some missions do not require any mods, but you can use some optional mods to improve your gaming experience with additional weapons, attachments, effects and sounds. Missions that are on different terrains from the vanilla terrains require CUP terrains all and some require also Bornholm. Missions with "RHS" in mission name require RHS mods.
Supported mods are:
AdvancedRappelling (server side) - rappel down from helicopters.
AdvancedUrbanRappelling (server side) - rappel down from buildings.
Bornholm - Bornholm terrain, requires CUP terrains.
CBA_A3 - Community Based Addons
CUP Terrains - Reworked terrains from previous Arma games.
JSRS sound mod (! might cause lagging during gunfire and explosions !) - improved sounds for more immersive gameplay.
MRT - Some laser mod required by SMA.
Open Chernarus Project - More enterable buildings on Chernarus.
RHS - Vehicles, weapons and other stuff from US and Russian army.
SMA - Additional weapons and scopes.
Mod packs - contains all needed and optional mods
MissionPack2.zip (RHS USF, RHS ARFR) 6.6 GB zip file
CommonPack2 (CUP Terrains) 11 GB zip file
Separate mods (the same mods as in the packs, but separately)
Bornholm 1.5 GB zip file
CBA 500 KB zip file
DynaSound2 400 MB zip file
MRT Accessory Functions 28 KB zip file
Open Chernarus Project 600 MB zip file
rhsafrf 3.35 GB zip file
rhsusf 3.28 GB zip file
SMAV2.7.1 1 GB zip file
Unzip all the modpacks and put them into your Arma 3 root directory (on Linux it is something like /home/myuser/.steam/steam/steamapps/common/Arma 3/). The mods should be right in the Arma 3 direcotry, for exaple: /home/myuser/.steam/steam/steamapps/common/Arma 3/@OpenChernarusProject. If you have questions, you can ask on Discord or write an email.
Enable the mods through game or put this into your Arma 3 launch options(dont forget to remove/replace space characters):