DOOM 64: How to Enable Fast Monsters

Here is a step-by-step guide on how to enable fast monsters for Doom 64 on Steam.

Step 1: Install and find your copy of Doom 64 in your Steam library

Step 2: Select the Properties tab

Step 3: Select the Set Launch Options tab

Step 4: Enter -fast into the Launch Options (-skipmovies is optional if you want to skip the intro movies)

Step 5: Launch the d*rn game and enjoy, and also die a lot probably.