Planing on marathoning this weekend

Which game should I play out of doom 1, 2, and plutonia. Also how long would one take?

Definitely Plutonia. I don't know your skill level, but it's pretty damn rough.  

Last time I did it, took me a few weeks on and off, but that's mainly because I suck

Doom 1 : 1-2 hours if you played it already.

Doom 2 : Same, more if you don't do it using saves mid maps or pistol starts. (probably a lot of deaths in the last 10 maps)

Plutonia or Evilution : 3+ hours if you don't know the maps. easily +5 if you get lost or killed a lot.

Of course all of these depend on difficulty and how you play. Do pistol starts if you want it to take the longest possible. Continuous or mid-map saves if you just want to blast through as soon as possible.

Yeah I'm most likely gonna do Plutonia Experiment

What's the goal here? Are you trying to get better or just save scum your way through some Doom WADs? I'm genuinely curious.

7 minutes ago, NerdyButLazy said:

What's the goal here? Are you trying to get better or just save scum your way through some Doom WADs? I'm genuinely curious.

I'm not doing a professional play through, I'm just wanting to play some doom for a long time.