How to be the Opposing Force (serious no jokes)

Go to Boot Camp, or as it's more commonly referred to, an Opposing Force district

Have your dad threaten or bribe the head of the board

Do a government cleanup job

Grab a weapon

Be the army man

Go on a killing spree

Get shot by a sintist in an orange suit flying at 300 mph. I wrote a guide on how 2 b a sintist guys check it out itss cool