I haven't run the 2 latest Strongholds on GM1 yet. Doing both with my primary Interceptor. Possible freeplay or contracts after depending on group. 2 hours tops.
The game creator, BoomboxCollosus, should send out invites 5-10 minutes before start time. If you don't receive invites, the creator may have left so start inviting each other through xbox/psn/pc on your own.
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