Hey already thrown in the multiplayer? Don't forget to put on custom badges, it's always nice to see some trollface on units rather than the same old ultramar blaze :D
Here's what in the Readme you surely didn't read :°
How to create a custom badge for DoW2: Retribution.
1) Open your favourite image-editing software application.
2) Create an image no larger than 128x128 pixels.
3) Save the image as an 8-bit .PNG file. Ensure the file size is not larger than 56kb.
4) Save or copy the image into the following folder: C:\Users\[username]\Documents\My Games\Dawn of War II - Retribution Beta\Badges
5) Launch Retribution and open the Army Painter. Your image should appear in the list of badges.