I can confirm that this achievement can be earned by faction-changing a lvl 90.
I switched back to horde today on my level 90 priest after a brief jaunt to alliance (I wanted to try MoP from both sides). The faction transfer processed, I chose my new race, logged in, and to my surprise, an achievement popped up straight away.
Just thought it would be worth mentioning!
Edit: You do not have to have two level 90s either. If you hit 90 on a horde toon (no lvl 90 alts) then switch it to alliance, you'll get the achievement. If you already have the achievement, you will not lose it by faction changing. The achievement is account-bound.
Achievements › Characters
Achievement Points25
How to Earn
Objectives2 objectives: Alliance and Horde
RequiresEvery one of the 2 criteria listed under How to Complete.
How to Complete
2 criteria from the current game data.
Other objectives (2)
Objectives the game data describes in text only.
- Alliance
- Horde
Details
- Category
- Characters
- Points
- 25
- Faction
- Both factions
- Requirements
- 2 criteria lines
More like this
Other achievements in Characters.
Quintessential QuintetReach maximum level with five different classes.50Terrific TrioReach maximum level with three different classes.30Dynamic DuoReach maximum level with two different classes.20So Much SharingBuy five Warband Bank tabs.20Breaking the Sound BarrierLearn the Master Riding skill.10Fast and FuriousLearn the Journeyman Riding skill.10Five Warband Mentors: MidnightReach level 90 with five characters.10Five Warband Mentors: The War WithinReach level 80 with five characters.10Four Warband Mentors: MidnightReach level 90 with four characters.10Four Warband Mentors: The War WithinReach level 80 with four characters.10
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Looks like an achievement is finally made for people that like to play on differing factions :)
Edit: Requires Level 100 as of WoD.
I was prepared! Got two toons for Alliance and one for Horde, all 85. Logged in after 5.0.4 prepatch, expecting to get it... No luck. Sadly, "maximum level" means "level 90", folks.
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