"Dota 2," "League of Legends," "Hearthstone: Heroes of Warcraft," "Star Wars: The Old Republic" and "Lord of the Rings Online" are popular online games as of 2015. These games were rated as some of the best free online games by TechRadar.
"Dota 2" is one of the most popular online games in PC history, and it holds multi-million dollar prize tournaments for high level players, according to TechRadar. The "Dota 2" international tournament of 2015 had a prize pool of $17,087,016, as reported by PC Gamer.
"League of Legends" is another online multiplayer game that attracts high skill gamers with a diverse range of characters and maps. Skilled players aim for shares of prize pools of over a million dollars in top tournaments.
From the makers of "World of Warcraft," "Hearthstone: Heroes of Warcraft" is an online fantasy card game that is similar to "Magic the Gathering." TechRadar describes the game as not having a steep learning curve and a basic rule set that provides hours of engaging game play.
"Star Wars: The Old Republic" and "Lord of the Rings Online" are massively multiplayer online games that are based on the popular move franchises. These games offer some in-game purchases, but they are optional.