The strategy game Game of Thrones Ascent has come to iPad from developer Kongregate. Based on the wildly popular George R.R. Martin novels and HBO show, Game of Thrones Ascent already has 2.5 million online players. The game will be updated with new quests each Monday following new Sunday episodes on HBO — season 4 of the show starts April 6. While free to play, Game of Thrones Ascent does feature a number of in-app purchases. Apple’s free…