A minor one, but it turns out that Arin was one of the few kickstarters for the game, meaning it may have never existed for Steam Train to play if it weren't for one of the original Game Grumps.
A combination of Game Grumps Vs and Steam Train, the first episode of Steam Rolled has a four-player team deathmatch in Quake 3: Arena. We've got Arin and Danny on red, and Ross is undermanned on blue. So who's the fourth member? Barry. He proceeds to mop the floor with Danny and Arin. While sticking to text chat for communication.
Arin: I think Barry has the advantage because he doesn't have to... [Danny: Trash talk?] Yeah, he can just concentrate.
Barry: [Through text chat after killing Danny again] I'm doing both, bitch.
It's made better when you consider that Danny ditched Ross and left him one down, which is a bit of a dick move considering Danny is a host on both shows while Ross only has Steam Train.note It's all in-character and good fun, but it's funny to think when regarding that context.
At the end of the Counter Strike: Global Offensive episode of Steam Rolled, Barrytalks. The rest of the group loses their collective shit.
In the Finale of Mario Party 4, Ross manages to win 100 coins from the lottery game, launching him into first place on the penultimate turn. However, due to winning a Battle mini-game and the 2v2 mini-game on the last turn, Barry ends up tying him going into the results stage. Barry wins the subsequent tie-breaking dice roll, and thereby the game.
The fact that Galactic Cafe sent Ross and Danny a specialized demo of The Stanley Parable, in which the narrator addresses them BY NAME.
They get the same thing in Electronic Super Joy, with the first boss being replaced by Ross, and Default Dan, where the character's head is replaced by pictures of Danny.
After Suzie had taken Fortune Street by storm, Arin surpasses her in the last episode and becomes the victor, thanks to Ross screwing over Suzy by landing exclusively on Arin's spots.
In Episode 8 of King's Quest, Ross figures out the answer to two puzzles in a row before Danny can. Barry even puts up a "Ross Wins" screen to celebrate.
Continuing the theme, in Episode 10 of KQV, they reach Mordack's Castle, ending the episode in a confusing basement maze. After saving their game, Dan and Ross walk thru the maze intending to restart with a walkthrough after showing how confusing the maze is. During the example, they run into the Dink, solve the puzzle, and save the game there. The awesomeness is realizing on their first try, they made it halfway through the maze correctly without a walkthrough. Dumb luck, sure, but still counts.
During Noitu Love 2 final boss fight Ross's hand starts hurting so Arin starts pressing the hit controls while Ross 'pilots.' It works much to their disbelief Except there is a third form.
Ross beating the second level of Duke Nukem 2 despite Arin's doubts.
Ross' story of revenge against his sister's bully using Myspace and internet vigilantism.
Ross beating Croco (the first boss) in Eryi's Action having never discovered the trick to easily survive the third wave (standing against his tail, the one part of his body that will not kill Eryi).
Danny manages to win a horse race against a horde of computer players despite the huge disadvantage of not knowing how to play Secret of the Magic Crystals. It helps that the race gets intense at times.
Playing Five Nights at Freddy's, for the first time, they made it through the first night without dying. They even had Freddy on them, when it became 6 AM!
Another awesome moment: They got through the third night, with power to spare! And with the three parts that are out so far, they haven't been killed by Foxy.
They then got killed three times by Foxy on the fourth night and gave up on the game.