From the editorial file Self-published by Eastman and Laird in May 1984 with a print run in the low thousands, funded by a tax refund and a loan. The most successful independent comic ever launched, and the definitive example of a small-press book becoming a global franchise.
First appearance (cover) of Leonardo - the earliest appearance on record is a cover, not an interior story.
First appearance (cover) of Raphael - the earliest appearance on record is a cover, not an interior story.
First appearance (cover) of Donatello - the earliest appearance on record is a cover, not an interior story.
First appearance (cover) of Michelangelo - the earliest appearance on record is a cover, not an interior story.
First appearance of Splinter - the earliest non-flashback appearance on record for this character.
First appearance (cover) of Shredder - the earliest appearance on record is a cover, not an interior story.
First appearance (cover) of Oroku Saki - the earliest appearance on record is a cover, not an interior story.
Origin story on record for: Donatello, Leonardo, Michelangelo, Raphael, Shredder.
Death on record for: Hamato Yoshi, Oroku Saki, Shredder.
The evidence
Claims here come from the story records for this issue, listed under Sources at the bottom of the file. Character hubs with full evidence tables are coming to this site.