Here is the full list of all 65 Air Marty achievements.
Congratulations! You unlocked the true ending.
Unlocked ending #52
Unlocked ending #51
Unlocked ending #53
Unlocked ending #54
Unlocked ending #56
Unlocked ending #55
Unlocked ending #59
Unlocked ending #60
Unlocked ending #57
Unlocked ending #58
Unlocked ending #61
Unlocked ending #62
Unlocked ending #64
Unlocked ending #63
Unlocked ending #43
Unlocked ending #44
Unlocked ending #42
Unlocked ending #41
Unlocked ending #48
Unlocked ending #47
Unlocked ending #46
Unlocked ending #45
Unlocked ending #40
Unlocked ending #39
Unlocked ending #38
Unlocked ending #37
Unlocked ending #36
Unlocked ending #35
Unlocked ending #33
Unlocked ending #34
Unlocked ending #32
Unlocked ending #31
Unlocked ending #14
Unlocked ending #13
Unlocked ending #15
Unlocked ending #16
Unlocked ending #12
Unlocked ending #11
Unlocked ending #9
Unlocked ending #10
Unlocked ending #4
Unlocked ending #3
Unlocked ending #1
Unlocked ending #2
Unlocked ending #6
Unlocked ending #5
Unlocked ending #25
Unlocked ending #26
Unlocked ending #28
Unlocked ending #27
Unlocked ending #29
Unlocked ending #30
Unlocked ending #17
Unlocked ending #24
Unlocked ending #23
Unlocked ending #18
Unlocked ending #19
Unlocked ending #20
Unlocked ending #22
Unlocked ending #21
Unlocked ending #7
Unlocked ending #8
Unlocked ending #49
Unlocked ending #50