Zandronum

Is it possible by cvar or mod to get the duke nukem 3d style bobbing? (The weapon weaving but not the up and down "hopping" motion)

You'd have to edit the source to do this.
I already have done something similar for my own personal binary, though there is no Duke3D styled bob yet.

In ZDoom you can have custom weapon bobs, but it's not in Zandronum yet.

TerminusEst13, AFAIK that's currently only weapon flags, not a cvar. (Twisted my own suggestion and work)

Anyway, just to get myself refreshed with Duke3D, it is pretty much the same as doom with a little differences.

• Weapon bob is much slower
• Weapon bobs 2x faster when running
• Weapon sits lower when not moving/bobing, giving the illusion it bobs upwards
• It's too similar to Doom so this shouldn't be needed.