This is a modified form of the script that made ObHack-FreeDoom
to retain the same levels, but have fewer chainsaws and more backpacks
and powerful weapons.

Tiny levels have at least two weapons to make them playable as deathmatch
levels.  The exit is what is made secret, so there's no hide and seek 
to find weapons, and so it's harder to finish the level.

Also: A lot more ammo is around for deathmatch

Source code:

http://samiam.org/obhack/ObHack-src-006b-pl1.7z