ZDoom LE (ZDoom 2.8.1 for old computers, with a OpenGL 1.4 renderer and blazingly fast framerates) ZDoom32 (ZDoom 2.8.1 but beefed up and kept more up to date, with a OpenGL 2.0 renderer) LZDoom (modern GZD but with older renderers)
BRUTAL DOOM V21 V19 SHOTGUN MOD
I also tried ZDoom32 but it's still relatively slow and playing BDC on it gets choppy at times, so if you got a bad PC, you should instead get ZDoom LE! It makes this mod run smooth like butter, at a smooth and rock-solid 60fps! Sometimes it's not the mod, but a combination of the source port and your PC, so try using something different. Brutal Doom received public recognition by John Romero himself during the IGN gameplay video made. Brutal Doom won the first ever Cacoward in 2011 for Best Gameplay Mod and a MOTY award for creativity by Mod DB in 2012. It is compatible with Doom, The Ultimate Doom, Doom II: Hell on Earth, Final Doom, and custom WADs.
BRUTAL DOOM V21 V19 SHOTGUN MODS
Maybe not even that rusty, my desktop PC (Dual-Core 3GHz) struggles with modern GZDoom despite that it should be able to run at least decently with simpler mods (Smooth Doom runs incredibly bad, for example) so you may need to get another port that can fit your PC. Brutal Doom is a gameplay mod that was created in 2010 by SergeantMarkIV. Some of you may already know this, but modern GZDoom just won't cut it for people with old, rusty hardware. I still can't figure out why it's still so slow, isn't there any function to count the amount of actors? Gore effects have also been toned down, being the main source of slowdown. Missiles have also been cleaned up and now spawn half of the actors they used to, yet they still look pretty nice. I have reduced the speed of the tracer effects so they don't drain performance as much. Performance has started to get better, it still really sucks in this Celeron 1.4GHz with a Intel HD 4000, but my goal is to get it running decently in this laptop. (I'm not saying that the sprites look bad, but they just look incredibly out of place) monsters will definitely be added but much later, right now weapons are my focus. If anyone has sprites that fit in better i would appreicate that. I have started development of Project Brutality Classic, and literally everything i have gotten in is the M2 Plasma Rifle, i would put the other weapons but they don't fit at all with the other weapons of v19 and look very out of place. Alright, here's a sort-of progress report: