This is a simple mod that slows down Doom's combat. It's meant for players who are unable to handle Doom's combat speed, like the physically or mentally handicapped. Player movement has been slowed by 0.6. Enemy movements have been reduced by half. Enemy attack speeds are much slower. And enemy projectiles are slowed by half.
Use this PK3 in GZDoom. I made it for GZDoom but I haven't tested other engines.
Using this mod will slow down Doom's combat if you can't handle its speed. I hope you find it useful. Don't know what else to put in this description, it's that simple.