Non-primary shared account, nothing particularly special. Available for Batman Arkham Origins Multiplayer.

Available for Aliens Colonial Marines VS matches, and also for assisting with Challenge boosting and organized co-op games if you are missing ACM collectibles such as Audio Logs, Dog Tags, and Legendary Weapons.

If you join an ACM co-op game uninvited or unannounced, follow the lead of the host instead of rushing checkpoints. You might be preventing the host from assisting other players whilst hunting collectibles. Never rush someone else's gameplay; don't assume that they're lost because there may be a logic to their meanderings that you're not observing. Always be courteous and respectful in someone else's co-op house. Never intentionally nor inadvertently glitch someone else's co-op hosting; this has happened to my squad mates and me during co-op.

If you join an ACM co-op game uninvited or unannounced, use the in-game chat feature (T key) to ask present players whether or not they are boosting challenges. Don't enter someone else's game and then simply start killing. You might be disrupting someone's challenge sequence or video recording. This has happened to me twice while boosting challenges.

Before attempting ACM Bug Hunt let's get a full squad of 4 players to make it both worthwhile and memorable.