7th Gen (Wii/PS3/360/PSP/DS) unmissables.
Halo 3 and Reach, Red Dead, Left 4 Dead 2, Orange box, the good Assassins Creeds, the good Call of Duty's, Mass Effect, Alan Wake, GTA IV and V, TLoU, Uncharted 1-3, Gears 1-3, Dark Souls, Minecraft, Elder Scrolls: Skyrim, BioShock, Dishonored, Fallout 3, ... etc. etc.
8th Gen (Wii U/PS4/Xbone/Vita/3DS) unmissables?
Red Dead 2, Witcher 3. Bloodborne, God of War.
disclaimers
*remasters don't count for me