Rough list, haven't seen the first four or the remake in a long time so I'm kind of just guessing on those. I read the script for Freddy vs. Jason when I was younger, then watched the film a bunch, so that takes the #1 spot pretty easily.
1. Freddy vs. Jason
2. Jason X
3. Friday the 13th
4. Friday the 13th: A New Beginning
5. Friday the 13th: The Final Chapter
6. Friday the 13th Part 2
7. Friday the 13th Part III
8. Friday the 13th Part VII: The New Blood
9. Jason Lives: Friday the 13th Part VI
10. Friday the 13th (2009)
11. Friday the 13th Part VIII: Jason Takes Manhattan
12. Jason Goes to Hell: The Final Friday
1. Freddy vs. Jason
2. Jason X
3. Friday the 13th
4. Friday the 13th: A New Beginning
5. Friday the 13th: The Final Chapter
6. Friday the 13th Part 2
7. Friday the 13th Part III
8. Friday the 13th Part VII: The New Blood
9. Jason Lives: Friday the 13th Part VI
10. Friday the 13th (2009)
11. Friday the 13th Part VIII: Jason Takes Manhattan
12. Jason Goes to Hell: The Final Friday