Forget what you know about first person shooters. Walk a week in the Postal Dude�s shoes. Freely explore full 3-D open ended environments. Interact with over 100 unique NPC's including Gary Coleman, marching bands, dogs, cats and elephants, protesters, policemen and civilians, with or without weapons. POSTAL 2 is all about choice; experiment with everyone and everything.
And remember ...it's only as violent as you are!
That's right, they made a sequel to Postal. I am so happy.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.