Without using cheats, how many saw blades can you take all the way through to the end of Ravenholm? As an added challenge (if you do not have the Zombie Chopper achievement, you’ll wanna do this anyway) you may only use the gravity gun (with the saw blades of course) through this area.
I am trying this right now and so far have 14 (haven’t been trying too hard to save every single one since it’s my first go through) and haven’t pulled out any other weapon. Screeny: