usage: headless_game.py [-h] [--steam STEAM] --compat COMPAT
                        [--profile PROFILE]
                        [--project {core,chat,vanilla-control}]
                        [--packed-core PACKED_CORE |
                        --packed-addons PACKED_ADDONS]
                        [--external-addons EXTERNAL_ADDONS]
                        [--packed-session PACKED_SESSION]
                        [--inspect-processes] [--inspect-headless-display]
                        [--capture-prison-view] [--observe-player-input]
                        [--approach-wide-display]
                        [--exercise-prison-held-action]
                        [--exercise-prison-selection]
                        [--exercise-prison-alignment]
                        [--exercise-prison-coarse-facing]
                        [--exercise-prison-coarse-approach]
                        [--exercise-prison-approach]
                        [--observe-prison-choices] [--observe-prison-gate]
                        [--exercise-relative-look] [--exercise-player-input]
                        [--timeout TIMEOUT] [--settle SETTLE]
                        [--failure-grace FAILURE_GRACE]
headless_game.py: error: An Arma Reforger game process already exists (PID 2277033); leave it untouched
