Cross-Faction Guilds - The Basics

[Scumstation]

• Guild affiliation with the Alliance or Horde will depend on the faction of the Guild Leader, and guild achievements and vendors will still reflect the guild's primary faction.
• Guild members of the opposite faction will benefit from unlocked shared perks but cannot contribute to specific achievements. As an example, Alliance members of a Horde guild could not contribute progress towards the "Alliance Slayer" guild achievement.
• Guild repairs and social conveniences, like shared chat, will be available to opposite-faction guild members.
• Players must be Battle.net friends or part of the same Battle.net community to invite or receive an invitation to an opposite-faction guild on the same realm.

Opposite-faction guildmates can only play communally inside instances; they'll still be considered Unfriendly to each other (or Hostile in War Mode) in the outdoor world.