Welcome To Black Mesa. You can choose whatever you would like to be, Or which sector you want to go to. You can choose to be a part of the science team, a part of the security team, A visitor, A part of the HECU Marines, A Black Ops, An administrator in the black mesa complex, An engineer at black mesa, A designer at black mesa, A janitor, A diaper changer, An alien, Literally anyone. Choose your own story at black mesa.