I re-read concerned recently. If you are a fan of any fps, especially half life, it is a must read.
It covers many fps mysteries - from exploding barrels, tons of guns and ammo everywhere, strange enemy ai tactics, and bizarre situations you run into - all are explained.
Read it here Concerned.
And I noticed that Frohman, the erstwhile protagonist, has...a shovel. Really not fair. Now I need to model one for the chaos mod to be truly complete. Really any mod, I'll have to add one to painkeep too.