No particular order, this are some of the best exclusives from PC. What do you think?   

                       Pillars of Eternity

 Pillars of Eternity is a role-playing video game developed by Obsidian Entertainment and published by Paradox Interactive. It was released for Microsoft Windows, OS X, and Linux on March 26, 2015 

 
                      World of Warcraft 

 World of Warcraft is a massively multiplayer online role-playing game released in 2004 by Blizzard Entertainment. It is the fourth released game set in the fantasy Warcraft universe, which was first introduced by Warcraft: Orcs & Humans in 1994 

 

                     League of Legends and Dota 2

                     

 Dota 2 is a free-to-play multiplayer online battle arena video game developed and published by Valve Corporation. 

 League of Legends is a multiplayer online battle arena video game developed and published by Riot Games for Microsoft Windows and macOS 

                       Counter Strike Global Offensive 

 Counter-Strike: Global Offensive is a multiplayer first-person shooter video game developed by Hidden Path Entertainment and Valve Corporation. 

                       Undertale 

Undertale is a role-playing video game created by American indie developer and composer Toby Fox. In the game, players control a human child who has fallen into the Underground, a large, secluded region underneath the surface of the Earth, separated by a magic barrier. The player meets various monsters during a quest to return to the surface, mainly through the combat system; the player navigates through mini-bullet hell attacks by the opponent, and can opt to spare monsters instead of attacking and killing them. These choices affect the game, with the dialogue, characters, and story changing based on outcomes.

 

                      Total War Warhammer

 Total War: Warhammer is a turn-based strategy and real-time tactics video game developed by Creative Assembly and published by Sega for Microsoft Windows, Linux and macOS via the Steam gaming platform 

 

                       Starcraft II

 StarCraft II: Wings of Liberty is a military science fiction real-time strategy video game developed and published by Blizzard Entertainment. It was released worldwide in July 2010 for Microsoft Windows and Mac OS X.