Warden Freeman achievement in The Orange Box

For this storyline achievement you have to hold out against multiple combine troops for a few minutes. They give you three turrets to cover four doors. The standoff isn't too hard but here's a few things you can try if having trouble:

- Pile boxes and barrels to block entryways and deny entrance
- patrol turret placements to keep them standing
- smash supply boxes before placing turrets to save time
- there is a second story balcony to get to with stacked boxed, hide there with turrets and watch for grenades.