Grimstone Special Activities Group

GRIMSTONE Special Activities Group

Some careers end with a final formation. For Grimstone, that was only the beginning.

Grimstone Special Activities Group is an Arma Reforger MILSIM community built around an OGA (Other Governmental Agency) organization focusing on covert paramilitary missions. In our story, GSAG draws its personnel from former special operations units: experienced operators who left their respective commands for assignments conducted beyond the reach of conventional formations and public recognition.

They brought their skills, their experience, and the lessons paid for on previous deployments. Their old patches stayed behind.

Under Grimstone, the briefings are compartmented, the intelligence is incomplete, and the consequences rarely end when the shooting stops. Every operation demands judgment. Knowing when to hold, what to question, and who to trust can matter as much as execution.

Our gameplay brings Ground, Aviation, Intelligence, and Medical personnel together. Our mission style includes reconnaissance, direct action, personnel recovery, and specialized operational support. Intelligence shapes planning and decision-making, while ground, aviation, and medical personnel work together to carry out the mission.

Every assignment has a purpose. Whether gathering information, moving teams into position, providing support, or recovering casualties, members contribute to a shared objective. Missions reward teamwork, adaptability, and disciplined execution.

Behind that darker identity is a community built on respect, clear leadership, practical training, and dependable teamwork. Members develop their specialties, earn qualifications, and prepare for greater responsibility. Previous MILSIM experience is welcome but not required; maturity and a willingness to learn are essential.

FIND YOUR SPECIALTY
Ground Operations: Weapons Officer, Engineering Officer, Communications Officer , and Intelligence Officer.
Aviation: Special Activities Aviators and Aviation Crew Specialists.
Operational Ground Medicine: Embedded medics who keep their teams in the fight.
Valkyrie Aeromedical: Flight medics connecting ground casualty care with evacuation support. CSAR / DART.
Mission Simulation: Build and run the scenarios that bring Grimstone’s operations to life.

Our dedicated Ground, Aviation, and Medical grade paths give each profession room to grow. Grimstone Operational Specialties provide focused training, while leadership appointments recognize members ready to take responsibility for others.

ADVANCED TRAINING
Expand your capabilities through specialized in-game courses in Advanced Field Operations, Special Reconnaissance, Precision Engagement, Advanced Navigation and Fieldcraft, High-Altitude Insertion, and Underwater Infiltration.

NEW TO MILSIM WE WILL TRAIN YOU
Experience is not required. Effort, maturity, and a team-first attitude are.
REQUIREMENTS
Arma Reforger on PC, Xbox, or PS5
Working microphone and Discord
Maturity, reliability, and willingness to learn
A team-first mindset
No prior MILSIM experience required

OPERATIONAL EXPECTATIONS
Scheduled unit operations
Optional training and development events
Clear communication and personal accountability
Real life always comes first

Ready to get involved? Contact our recruitment team and tell us where you want to contribute.