Electronic Arts may announce tomorrow that it has bought Age of Champions developer KlickNation, according to sources familiar with the matter. The terms of the deal will likely not be disclosed. KlickNation has around 70 employees and has at least one angel investor, Robert Simon of Ariva Partners.

KlickNation would add a core gamer-focused studio to the two social gaming ones the company currently has in Dragon Age Legends developer EA2D and Playfish. These two studios mainly produce social games related to EA’s existing franchises like Dragon Age, The Sims and FIFA. Playfish also maintains the original intellectual property it created like Restaurant City before it was bought in 2009 for $300 million in cash and stock plus $100 million in earnouts.

In acquiring KlickNation, EA could be entering the emerging core gamer market on Facebook, which is currently dominated by strategy combat games like Kixeye’s Backyard Monsters and IGG’s Galaxy Online 2. CrowdStar and RockYou recently joined this market with their own strategy combat titles released in the last three months.

KlickNation is a relatively small developer compared to other studios producing core strategy games. According to our AppData traffic tracking service, the developer at one point enjoyed 1.3 million monthly active users, and saw around 150,000 daily active users at its peak. Today, the developer sees 395,441 monthly active users and 49,022 daily active users. In the last month, all of its major games — including its newest game, Six Gun Galaxy — have flattened in monthly and daily actives, a sign that KlickNation may be preparing to sunset the games after the acquisition is announced in the same way that DNA Games did when bought by Zynga.

AJ Glasser contributed to this story.