The most complex sequence started with the launch of Science Fiction Classics in 1967. Following the sixth issue a bewildering sequence of title changes began. The seventh issue was titled SF Adventure Classics. This was followed by Strange Fantasy: #8, 9 and 10. After that SF Adventure Classics #8 was issued, which had the retroactive effect of splitting off the Strange Fantasy issues into their own sequence, which continued through #13.
SF Adventure Classics #8 was followed by Space Adventures #9, 10 and 11. A title change back to SF Adventure Classics appeared to take place with the next issue, #12. However, shortly afterward a Space Adventures #12 also appeared and continued the original sequence, eventually concluding with #14. Thus was the second sequence of SF Adventure(s) (Classics) retroactively split off to form its own sequence, which continued for several more years.
Other reprint titles included:
| 1967 |  #1 |
 #2 Fall |
 #3 Winter |
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| 1968 |  #4 Spring |
 #5 Summer |
 #6 Fall |
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| 1969 |  #7 Winter |
 #8 Fall |
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| 1970 |  #12 Winter |
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| 1971 |  #13 Spring |
 #14 Summer |
 #15 Fall |
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| 1972 |  #16 Jan |
 #17 Mar |
 #18 May |
 #19 Jul |
 #20 Sep |
 #21 Nov |
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| 1973 |  #22 Jan |
 #23 Mar |
 #24 May |
 #25 Jul |
 #26 Sep |
 #27 Nov |
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| 1974 |  #28 Jan |
 #29 Mar |
 #30 May |
 #31 Jul |
 #32 Sep |
 #33 Nov |
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| 1969 |  #8 Spring |
 #9 Summer |
 #10 Fall |
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| 1970 |  #11 Spring |
 #12 Summer |
 #13 Fall |
| 1970 |  #9 Winter |
 #10 Spring |
 #11 Summer |
 #12 Winter |
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| 1971 |  #13 Spring |
 #14 Summer |
| 1965 |  #1 |
 #2 |
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| 1966 |  #3 |
 #4 |
 #5 |
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| 1967 |  #6 |
 #7 |
 #8 Fall |
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| 1968 |  #9 Winter |
 #10 Spring |
 #11 Summer |
 #12 Fall |
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| 1969 |  #13 Winter |
 #14 Spring |
 #15 Summer |
 #16 Winter |
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| 1970 |  #17 Spring |
 #18 Summer |
 #19 Fall |
 #20 Winter |
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| 1971 |  #21 Spring |
| 1966 |  #1 (Winter) |
 #2 (Spring) |
 #3 (Summer) |
 #4 (Fall) |
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| 1967 |  #5 (Spring) |
 #6 Fall |
 #7 Winter |
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| 1968 |  #8 Spring |
 #9 Summer |
 #10 Fall |
 #11 Winter |
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| 1969 |  #12 Spring |
 #13 Summer |
 #14 Fall |
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| 1970 |  #15 Spring |
 #16 Summer |
 #17 Fall |
 #18 Winter |
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| 1971 |  #19 Spring |
 #20 Summer |
 #21 Fall |
 #22 Dec |
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| 1972 |  #23 Feb |
 #24 Apr |
 #25 Jun |
 #26 Aug |
 #27 Oct |
 #28 Dec |
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| 1973 |  #29 Feb |
 #30 Apr |
 #31 Jun |
 #32 Aug |
 #33 Oct |
 #34 Dec |
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| 1974 |  #35 Feb |
 #36 Apr |
 #37 Jun |
 #38 Aug |
 #39 Oct |
 #40 Dec |
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| 1975 |  #41 Apr |
 #42 Jul |
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| 1970 |  |
 #2 Fall |
| 1970 |  |
| 1970 |  |
| 1970 |  #1 Summer |
| 1970 |  #1 Fall |
 #2 Winter |
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| 1971 |  #3 Spring |
 #4 Summer |
| 1975 |  |