I agree that there are no universal answers. This list only includes games on PC (or with PC ports).
top tier: Terraria, Kerbal Space Program, Rocket League, Dota 2, Spelunky, AI War,
honorable mentions: TW Shogun 2, Infested Planet, Wargame series, Metal Gear Solid V, Revenge of the Titans, Desktop Dungeons, Evolve, Titanfall, Broforce, Dragon’s Dogma, MK9, GG Xrd, Endless Legend, The Witness, Lethal League,
somewhat older: Red Faction Guerrilla, Minecraft, Monday Night Combat, Men of War series, Dawn of War 2 series, BlazBlue
too soon to call: Dark Souls 3, Offworld Trading Company, Overwatch