From what limited gaming I do, on the PC I would say it is Mechwarrior Online. Free to Play but pay for extras. Quad-core, 8+ gb RAM, and at least 1+gb Video with it being newer gen cards needed as minimum... It is a hefty requirement. I lagged with 8gb RAM, Quad-core i5-3470 and an AMD Radeon HD 6570 - upgrading the RAM to 12+gb did help as did the i5 mentioned - it was worse on a dual-core Pentium G2010.