Beaten, probably the Castlevania series. Do Remakes count?
- Castlevania (NES)
- Castlevania II: Simon's Quest (NES)
- Castlevania: The Adventure (GB)
- Castlevania III: Dracula's Curse (NES)
- Castlevania II: Belmont's Revenge (GB)
- Super Castlevania IV (SNES)
- Castlevania: Rondo of Blood (PC Engine)
- Castlevania: Bloodlines (MD)
- Castlevania: Dracula X (SNES)
- Castlevania Legends (GB)
- Castlevania: Symphony of the Night (PS1)
- Castlevania 64 (N64)
- Castlevania: Legacy of Darkness (N64)
- Castlevania: Circle of the Moon (GBA)
- Castlevania Chronicles (PS1) -
Remake- Castlevania: Harmony of Dissonance (GBA)
- Castlevania: Aria of Sorrow (GBA)
- Castlevania: Lament of Innocence (PS2)
- Castlevania: Dawn of Sorrow (NDS)
- Castlevania: Portrait of Ruin (NDS)
- Castlevania: The Dracula X Chronicles (PSP) -
Remake- Castlevania: Order of Ecclesia (NDS)
- Castlevania: Lords of Shadow (X360)
- Castlevania: Lords of Shadow 2 (PS3)
I have a lot of Mega Man games but I haven't beaten them all, still working on it