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1.
A new MMORPG created by NcSoft, based on BETA tests and preview weekends, this game is easily going to tear World of Warcraft a new ass hole.
Sean: Hey Dave you coming on World of Warcraft?

Dave: Fuck that shit I'm playing Aion!
by Semperviren June 10, 2009
 
2.
A new MMORPG being released by NCSoft for a Western audience. Previously released in South Korea and China, the game has enjoyed widespread acclaim as a potential challenger to the current undisputed market leader, World of Warcraft. NCSoft have assigned their Western counterparts ("NCWest") the task of making alterations - subtle and otherwise - to the game, in order for it to appeal more to a Western audience.

Due for release in September of 2009 in both the EU and North America, many hope that it will finally bring some competition to the world of MMO gaming, to the point of "fanboys" on both sides badmouthing eachothers' games.
Person A: "Hey, check this new MMO; it's called Aion. You can even fly! This is totally going to ruin WoW."

Person B: "I don't think it's going to *ruin* it, per se... WoW is still an excell-"

Person A: "Dude, what the hell?! AION IS BETTAR."

Person B: "NO U."

etc. etc.
by Leivan July 13, 2009
 
3.
Crazy, not in right mind, not to be messed with.
by king Zane February 03, 2010
 
4.
A game where people circle-jerk on each other. They also role play as "clerics" or "rangers" and wear magic hats and cloaks.
Me and my friends were playing Aion last night. There was so much semen on my epic PvPvE Gladiator set that I couldn't even wash it off.