The TGWTG Year One Brawl is the That Guy with the Glasses one-year anniversary special, which consists of a brawl between the site's most prolific contributors. The Nostalgia Critic/The Angry Video Game Nerd rivalry comes to a head, splitting the Glasses crew roughly across medium lines: reviewers of video games (plus the guy who does the Nerd's theme music) versus the other reviewers. It can be found here.
The TGWTG Year One Brawl provides examples of the following tropes:
Big Damn Heroes: Members of each side show up one after the other just in time to stop the Nerd or the Critic from getting the shit kicked out of them. By the time there's about five people on each side, people stop saving each other's asses and just show up randomly.
The Cameo: Rob Walker is seen kicking a parking meter during the opening number, and Michaels Michaud and Ellis are seen in passing while the Nerd and the Critic chase each other down the halls.
Cavalry Betrayal: Pretty much anyone on Nerd's side counts as this. Aside from one person, everyone else is a TGWTG member that decided to stick with their fellow gamer. The only one from Nerd's series is Kyle Justin, the guitar player who does his theme and is an occasional supporting character.
Critic: Benzaie! I knew you'd come to our aid! Quickly, clench your fists in rage and score one for our side! (Benzaie punches Linkara in the gut, causing him to fall over in pain) Critic:...He's on our side. (Benzaie punches the Critic in the face)
Cat Fight: Spoony faces off against That Chick With the Goggles and the Nostalgia Chick faces off against Sage. Suddenly, Spoony suggests that he and the Nostalgia Chick switch opponents, then he and Sage pretend to fight for about a second before stopping and taking pictures of the off-screen catfight between the two girls. Toward the end of the Brawl, about five of the guys just stand around enjoying the view while the Nostalgia Chick and Little Miss Gamer beat each other with pillows.
Double Take: At the beginning, while the Critic is singing how an "adequate day" it is, he turns to the side, keep on singing, suddenly stop to yell "Fuck me!" and turns again, showing the viewers he just spotted the Angry Video Game Nerd.
Dynamic Entry: Most of the participants. Of particular note is Spoony appearing out of nowhere and hitting Little Miss Gamer with a Shoryuken.
Hypocritical Heartwarming: Chick saves Critic from getting beaten up, Critic defends Chick from getting (he believes) insulted and he tells people on the other team to leave Ma-Ti alone.
Imperial Stormtrooper Marksmanship Academy: The Critic only manages to shoot a few things at point blank range with his gun and no one seems to be able to hit the broadside of the barn with the SuperScope. In fact, only 4 shots are shown to actually hit anything in the whole brawl: Critic shoots Angry Joe, Critic shoots the SuperScope out of the Nerd's hands, Nerd hits Critic with a thrown pen, and Ma-Ti hits Chester A. Bum with a shot from the SuperScope.
Benzaie: (in French) Sorry, Mr. Critic, but I'm a gamer first and a friend second... and quite frankly Mr. Video Game Nerd is a god among gamers. So sorry, but I must deliver you unto a world of pain. Critic: Fortunately I can read your subtitles, you back-stabbing snail eater! I hate you!
TheCat: As the Nerd is apparently uppercutting the Critic's jaw... And slamming him to the ground... And finally... nailing him in the privates.
Talking to Himself: The whole thing is broken up by Ask That Guy, who talks directly with Nostalgia Critic and takes his photo with the others. (and in just Acting for Two, Chester A. Bum pummels the AVGN while Nostalgia Critic is on the ground scrambling for his gun)
In the Year One Brawl, there was a brief scene with the Nostalgia Chick & Little Miss Gamer hitting each other with pillows and to balance it out, Spoony & Bennett the Sage volunteered to shoot a scene with them pillow fighting. When they actually shot the scene, however, Spoony & Sage then started acting as if they were sorority girls, giggling whilst telling each other to "stop it", before Spoony declared "I'm so horny right now!" This immediately forced everyone to break down in laughter, and render the footage unusable.
Film Brain was going to be part of it, but he couldn't participate because of finals.