It's late at night and I'm thinking about the legendary game series by Hideo Kideo,
Metal Getal

So many sequels

Metal Getal 2: Solid Snolid,
Metal Getal Setal,
Metal Getal Setal 2: Sons of Line, or Substub for the special edition
Metal Getal Setal 3: Snake Eake (or Subsubstub)
Metal Getal Setal 4: Guns of the Puns
And then
Metal Getal Setal 5, Ground Zounds, and The Phantom Pantom