Might C5 be something "exile" -releated (derived from "X isle")?
There are PC games called Exile. So most likely.
A1: Elder Scrolls
A2: Splatterhouse
A3: Time Splitters
A4: The New Zealand Story
A5: Heart of Darkness?
A6: Guitar Hero
B1: Micro Machines
B2: Final Fantasy
B3: Dynasty Warriors
B4: Worms
B5: Golden Sun
B6: Overboard!