Before you jump into the game, if you review the Achievement/Trophy list you will notice that there is one for creating and wearing a custom mask in the game. To earn this one you have to do a few things outside of the game first - register with EA (if you have not already done so) and link your Gamertag or PSN ID to your AO2:FD account.
So first head over to http://www.armyoftwo.com and check to see if you have an EA account already - if you have played other games from EA with online content chances are that you do - so find out by doing the log-in thing. If you do, skip to the next part of this section - if you do not, go ahead and register with EA now, and create your account.
Next Part of this Section
I know, I am so funny I make me laugh too... Right, so you now have linked your game account to the EA account, so you are ready to run the Mask and Armor creator! Using it is pretty basic and there are good instructions and a tutorial on the site to help you.
I quickly made my own mask - called the Chucky Mask - and uploaded it to both the server and my game - and I made it publicly available if you want it. It is a yellow mask with a green four-leaf clover and the phrase - Tiocfaidh Ar La - on it. That is Irish, and it is pronounced Chucky-Arr-Laa and it means "Our Day Will Come."
Once you have uploaded your mask to the server and your game, you can use it by selecting it in the Custom Mask Menu. Once you have done that you are pretty much done with this part of the process. When you collect your gear in the game, your new mask will be in it, and you will be wearing it!
To earn the actual Achievement / Trophy there is an additional few steps you have to take - so do the following:
1 - Once you have uploaded the mask to the server and your game and verified this by selecting the mask as your custom mask;
2 - Enter Verses Mode from the Main Menu and select Options;
3 - Equip the mask on both factions;
4 - Play a Versus Match and it should then unlock!
Note: You may find that you can only equip the graphic on the mask of the first faction and the pad of the second - that is fine - once you enter the Quick Versus game this will unlock.