I received word from Phil Co, lead designer on Requiem: Avenging Angel, that a new playable demo for the game should be available tomorrow. From the description, this demo sounds like it will be a bit more substantial than the first one:

The Second Requiem Playable Demo should be up by tomorrow.
Here's the breakdown:

4 "JAM's" (or sub-levels) that make up the one level
Setting in the Power Plant of New Damascus
Tons of soldiers, Demon Rats, Demon Dogs, and Flying Kynthra
Tons of Angelic Powers including Resurrect, Possess, To Salt, Bloodboil, and Warp Time

Mission Objectives:
Meet with Rebel Soldier, Elijah
Find Cathcart, a Power Plant Exec Sympathetic to the Rebellion
Blow up the Back Up Reactor to set up a diversion

The demo is playable on:

Minimum:
P166
32 Megs of RAM

Software
D3D
3DFX