here's my list so far:
Pride of Nations
Silent Hunter 5
Crusader Kings 2,
along with:
Mongols DLC,
Ruler Designer DLC,
Songs of Albion DLC,
Songs of Faith DLC,
Songs of the Holy Land DLC
Majesty 2 collection taken
Majesty Gold HD
Warlock: Master of the Arcane
Victoria 2
I can't promise that just giving out the keys will work since some are Amazon bundle games but what the hel, I can give it a shot.