I saw the AGDQ run, and I've compiled a list of comments below on the run.

To give some background to myself, I played L4D1 a lot. Easily over 2-3k hours. My account only has around 800 hours tracked, as that time tracking feature was implemented after L4D1 was released. I was going to play on a CPL L4D team, but both CAL/CPL died, and L4D2 was announced shortly after that, killing the competitive scene for L4D1.

I helped some people work on some TAS/TSA of L4D1 back in the day. Also, I know a lot of the glitches/tricks throughout the various versions (like turret launches, endless melee, etc). Let me know if you guys are looking for any optimizations. I mostly know the L4D1 Versus maps (which have differences from Single Player), but I remember when they patched those things in Versus (and not in SP), so I recognize the differences.

Lastly, do you guys have a Discord channel?

AGDQ Run Comments:

• I found it strange that you didn't use the shortcut on Blood Harvest 3 by going up the hill after exiting the tunnel. I also believe you can skip the bridge falling down scene, but I forget the mechanics of it.
• You didn't use the shortcut of jumping over the semi in Crash Course 1.
• You mention needing to get an Auto-Shotgun for The Sacrifice 1, and checking various locations is key. However, you miss at least 2 places it can spawn, right near the start of the map.
• I'm almost positive that skipping the tank in The Sacrifice 1 is possible. I know from experience that the tank can miss-spawn and die instantly on that map. But, I'm fairly certain you can simply go over the train car and skip the event.

Hey, Demon!. I'm not the most knowledgeable on L4D campaigns, but i guess that for Sacrifice 1, if you have autoshotguns, killing the tank is faster, since it just melts. Skipping the Tank is possible, i'm pretty sure, but shotgunning him to death probably is faster. And about the shotgun spawns, they might be a little out of the way, not sure though.

The one thing i'm sure about is that we do have a Discord channel. It's mostly for L4D2 speedrunning at the moment but it the games are pretty similar. Here's the link for it: https://discord.gg/HHJcT5C

I bet that Master and deagle can answer to those comments a bit better than me.

Awesome. Thank you! I was looking through some of my old videos, and I completely forgot about all the shortcut jumps that you can do. Here is a good example on Dead Air 1.

And, apparently, I even made a video of the shortcut I mentioned above on Blood Harvest 3.

Oh my gosh. I forgot how many things I knew about this game. Here is a compilation of stuff I made for a guy doing a Time-Scale Assisted run of L4D.