Versus is an Achievement Hunter series, first introduced on March 8, 2013 and uploaded every Thursday after. The premise behind Versus is to put two Achievement Hunter members in a one-on-one match, fighting each other for the Versus belt to be 'King of the Office' for a week. Geoff Ramsey originally came up with the idea following their Let's Play of WWE '13 when Michael Jones brought in a wrestling champion's belt, which was used as the temporary trophy for the series until a new trophy with a golden rooster on it (the rooster being the logo for Rooster Teeth) was made.
- There are only two people in a match, the previous week's winner and the current week's challenger.
- It should be noted that occasionally more than two people will be in an episode.
- Previously, the order was where the Achievement Hunters sit in the office in a clockwise direction, Lindsay was added in between Gavin and Ryan in Episode 49 (Gavin, Lindsay, Ryan, Jack, Geoff, Ray, Michael). This order format ended in Episode 51.
- The challenger gets to choose the game. There are no restrictions as to whether it's a console game or a PC game (in fact, it doesn't have to be a video game at all, as shown in the past with a foam dart duel and arcade claw game), and the defender doesn't necessarily have to have played the game before.
- The current week's winner will be a player in next week's Versus.
- All the other Achievement Hunters will act as commentators for the match.
- In-game rules may be changed to speed up the pace of the game.
- In Episodes 31 and 32, both matches were played in Grand Theft Auto V, marking the first time that a game has been repeated. In Episode 33, Geoff was next to face the previous week's winner, Jack. Geoff stated that he wanted to do Grand Theft Auto V again, but thought that the viewers wouldn't like them playing the same game three weeks in a row, so he went with MX vs ATV. Since a game has been repeated, there is now no rule that states a game cannot be repeated.
- In Episode 49, instead of Gavin (the previous week's champion) facing off against Ryan, he instead faced off against Lindsay marking her first time competing in a Versus.
- In Episode 52, a Versus reset took place and a new challenging order was made. To determine the order, all 7 current competitors competed in a go-kart race and the order of completion of the race would be the new challenge order of Versus. The new order was: Jack, Ryan, Michael, Gavin, Ray, Lindsay, and Geoff. This order format ended in Episode 103.
- In Episode 91, Ray was supposed to challenge Gavin (the previous week's champion), but was noticeably absent, which led to the idea of a special Team Edition of Versus where Gavin teamed up with Geoff to take on Jack and Ryan. Because of this reason alone, there is now a rule stating that if the challenger does not show up to face the champion in this week's Versus, then the champion does not have to defend his or her title; however, the champion still has to participate against at least one competitor, or in teams (as shown in Episode 91), in a special non-title match (Statistics will not change if a non-title match takes place).
- In Episode 104, a second annual Reset took place where all 8 competitors (excluding Geoff and including new participants Matt and Jeremy) faced off in mini-golf to determine the new order. The new order is now: Ryan, Gavin, Matt, Michael, Jack, Lindsay, and Jeremy.
- Ray was supposed to be after Lindsay but has since quit.
- In Episode 118, Geoff inserted himself back into the rotation between Lindsay and Jeremy. However, he only challenged Lindsay as a one time fashion.