If playing on the Xbox 360, you’ll need to download the VIP Pass to have access to multiplayer.
The majority of the multiplayer achievements can be done with two people, but three of the achievements require four people.
Multiplayer - Xbox Live
For this, create a Jam Session game. Scroll down to Discipline and choose Joyride. Invite three others and make sure everyone stays in for the full 20 minutes. Once it ends, you’ll unlock:
Next, create a Team Jam Session of Cat n Mouse. Whoever becomes the mouse (Mini Cooper) is random, so either quit and restart or keep playing until you’re the mouse and then win to unlock:
First game mode win.
Create a Jam Session of Outbreak and simply avoid being infected to unlock:
Second game mode win.
Search in Solo Pro Tour and choose Party Modes to get a game of Invasion. Complete (make sure to win) the match without running into anything other than the robot cutouts to unlock:
Third game mode win.
In the same lobby, get a game of Transporter (veto if necessary). Grab the flag, then run into your boosting partner. Keep running into them until you’ve stolen the flag five times to unlock:
Go on to win the match and for winning all four game modes, you’ll unlock:
Search Solo Pro Tour and choose Hardcore. Win the race to unlock:
Create a Jam Session with these settings:
Rounds - 5
Discipline - Rallycross
Track Selection (same for each round):
Driver Assists - Disabled
Impact Ratings - Enabled
Complete 2-5 rounds without hitting anything to unlock:
The last base game multiplayer achievement is for reaching level 35 and you’ll unlock two achievements along the way.
The best way to gain experience is to idle boost. You can either do this by yourself with two Xboxes or with a boosting partner. You’ll need 1-2 wired controllers (depending on if you’re multi-boxing or not). You can double-box with either two physical copies or one digital copy and either two Xbox Ones or an X1 and an Xbox 360. You could also use two 360s but you’d need two gold accounts.
Set an X1 as your home Xbox and create a silver account on the same Xbox (this account will have gold because your main account does), then use the other Xbox with your main account. Now onto the boosting method.
Search Team Pro Tour and select Gymkhana. When choosing cars, select the first option (Subaru Impreza WRX STi GD Gymkhana). Rubber band the and , causing your car to continuously drive in circles. The match will take a minute and a half. Once it ends, you’ll earn around 900 XP. After leaving this to idle for 18 hours, you’ll unlock:
Congratulations on completing the base game for DiRT 3!
Find anything you think is wrong with this walkthrough? Help us fix it by posting in its Walkthrough Thread
This walkthrough is the property of TrueAchievements.com. This walkthrough and any content included may not be reproduced without written permission. TrueAchievements.com and its users have no affiliation with any of this game's creators or copyright holders and any trademarks used herein belong to their respective owners.