8 straight hours on Mega Man X collection. Ib eat 1 - 3 with all armor e-tamks, heart tanks etc. Resident Evil 4 from 1 PM to 9 PM and now i have better reflexes because of that. Tho longest might have been 11-12 hours from when i got Ogre Battle 64. I love that game. I had a good Chrono Trigger run for 9 hours and completed the main story i think. I Speed Ran that game on a new game plus in about 8 hours.