Achievement Details

Open Relationship

Complete 10 chapters in Co-op on any difficulty (Marcus or Dom)

Open Relationship0
1 guide

How to unlock the Open Relationship achievement

  • ZServZServ95,092
    08 Nov 2008 09 Nov 2008
    44 5 0
    If you're playing on insane, you'll probably need to co-op anyway. Otherwise, get a friend to either play with you local or online. After 10 chapters, (when text comes up on the screen saying the name of the act, then the chapter) you'll be awarded with the achievement.
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