Civilization series - underestimated, then epic gave 6 to me for free. Ended up buying the platinum edition on steam and the 2 missing dlcs.
Dragon Quest series - ovelooked. wanted to play a jrpg and decided to try dq8 on 3ds. Loved it. Now I've played 1-5, 8, and 11. Currently playing 6.
4 ≈ One