The second major release of vintage Star Wars action figures occurred in 1980 with the release of the Empire Strikes Back.
There were either 27 or 29 Star Wars figures in TESB line depending on whether you consider C-3PO with removable limbs and R2-D2 with an extendable periscope feature to be new and distinct figures rather than variants of their 1977 originals.
The original Empire Strikes Back line had 29 carded figures.
The first wave of 20 of these were displayed with the original 21 on the 41-back card.
All of the original Star Wars line got their own new Empire cards, whether they were in the movie or not.
The remaining nine in the second wave pitched up on the later 48-back cards.
It should really have been 50 but Kenner omitted the more basic versions of Artoo and Threepio from the back to avoid confusion, even though they did get released on Empire cards in that first wave before being effectively replaced on shelves for the remainder of Empire and then Jedi by their periscope and removable limb-sporting successors.
Notably Zuckuss the insectoid bounty hunter ended up with the wrong name of his similarly insectoid droid bounty hunting partner 4-LOM and vice versa.
Three creatures for collectors to add to these are the Wampa ice creature, the Imperial Probe Droid and of course the faithful and comfortable Tauntaun.
All the original Star Wars figures were re-released with Empire Strikes Back cards, nineteen were reissued with Return of the Jedi cards and six made it to the fourth line which was called The Power of the Force.
As for the Empire figures twenty seven of them were reissued on Jedi cards and two (3PO and Yoda) were in the Power of the Force.
This level of re-carding figures and keeping every one available on shelves as long as possible maintained kids ever-growing collections and helped give even the most obscure characters a level of early geek cache.
1. Luke Skywalker (Bespin Fatigues) [Blonde/Sandy Hair]
2. Leia Organa (Bespin Gown) [Flesh Collar/Turtle-neck]
3. Han Solo (Hoth Outfit)
5. IG-88 [Grey/Metallic]
6. Rebel Soldier
8. Imperial Stormtrooper (Hoth Battle Gear)
9. Lando Calrissian [Standard Face/White eyes and teeth]
10. Bespin Security Guard (White) [Medium/Long Moustache]
11. Yoda [Orange/Brown Snake]
12. Leia (Hoth Outfit) [Dark Brown/Reddish Brown Hair]
13. Rebel Commander
14. AT-AT Driver [Scarlet/True Red Logo]
16. Imperial Commander
17. Ugnaut [Lavender/Green/Blue Apron]
20. Han Solo (Bespin Outfit)
Variants from now on are less well-known than those earlier gaffs and most involve slightly different colour details.