En Masse Entertainment’s TERA: Fate of Arun has achieved a rather surprising milestone on Steam despite launching on May 5th. It’s the most played MMORPG on the digital gaming service with 4.5 million players in North America, bringing its worldwide total up to 20 million.

An infographic for the game has been released since then, indicating a whopping 6 million monsters killed; 97,847 guilds actively running around and committing the mass slaughter; and 70,000 dungeons cleared each day. The average player count per day is 5,347 players with a record of 18,454 concurrent players. It should be noted that TERA is free to play and available to download for any Steam player.

Fate of Arun is actually the latest update for TERA, which has been around since January 2011 when it first launched in Korea. The update added a new max player level of 65 along with four new zones, new story missions and four new instances aka raids for players to experience.

Have you been playing TERA on Steam? Let us know what you think of it in the comments below.