The short answer is you have a long way to go.
And technically you only have 11 Godzilla movies. Sony's Toho Godzilla collection includes The Rebirth of Mothra 1 and 2, which aren't technically part of the Godzilla series.
Here's a list of every Godzilla film. The last two have yet to be released of course:
1. Godzilla (1954)
2. Godzilla Raids Again
3. King Kong vs. Godzilla
4. Mothra vs. Godzilla
5. Ghidorah: The Three Headed Monster
6. Invasion of Astro-Monster
7. Godzilla vs. The Sea Monster
8. Son of Godzilla
9. Destroy All Monsters
10. All Monsters Attack
11. Godzilla vs. Hedorah
12. Godzilla vs. Gigan
13. Godzilla vs. Megalon
14. Godzilla vs. MechaGodzilla
15. Terror of MechaGodzilla
16. The Return of Godzilla
17. Godzilla vs. Biollante
18. Godzilla vs. King Ghidorah
19. Godzilla and Mothra: The Battle for Earth
20. Godzilla vs. MechaGodzilla II
21. Godzilla vs. SpaceGodzilla
22. Godzilla vs. Destoroyah
23. Godzilla (1998)
24. Godzilla 2000
25. Godzilla vs. Megaguirus
26. Godzilla, Mothra, King Ghidorah: Giant Monsters All-Out Attack
27. Godzilla against MechaGodzilla
28. Godzilla: Tokyo S.O.S.
29. Godzilla: Final Wars
30. Godzilla (2014)
31. Shin Godzilla
32. Godzilla: Planet of the Monsters
33. Godzilla: City on the Edge of Battle
34. Godzilla: The Planet Eater
35. Godzilla: King of the Monsters
36. Godzilla vs. Kong
Now a lot of these films are out-of-print and hard to find, but hopefully they'll be getting physical releases soon.
Criterion/Janus Films owns Godzilla (1954), Godzilla Raids Again, Mothra vs. Godzilla, Ghidorah: The Three Headed Monster, Invasion of Astro-Monster, Son of Godzilla, Destroy All Monsters, All Monsters Attack, Godzilla vs. Megalon, Godzilla vs. MechaGodzilla and Terror of MechaGodzilla. But right now only Godzilla (1954) has a physical DVD/Blu-ray release. Fingers crossed that will change soon. The rest are on select streaming services though.
Kraken Releasing owns Godzilla vs. The Sea Monster, Godzilla vs. Hedorah, Godzilla vs. Gigan and The Return of Godzilla. All are available on Blu-ray and DVD.
Universal owns King Kong vs. Godzilla, available on Blu-ray and DVD.
Warner Brothers owns Godzilla (2014) available on Blu-ray and DVD. They will also be responsible for releasing Godzilla: King of the Monsters and Godzilla vs. Kong in the future.
Funimation owns Shin Godzilla available on Blu-ray and DVD.
Netflix currently is streaming Godzilla: Planet of the Monsters, Godzilla: City on the Edge of Battle and will stream Godzilla: The Planet Eater next month. No word yet on a physical release.
And of course the rest you have are owned by Sony.
Hope this helps.
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