Kaiju Alpha has no patch notes in the normal sense. SULU KAKA publishes each update by overwriting the Roblox game description, which destroys the previous one. Archived captures of that description are the only surviving record, and this is all of it: 8 updates with the official text intact, one inferred from the place name, and 10 that no longer exist anywhere.
They tell you what was added, in about six words. A typical complete patch note for this game reads ADDED GOROSAURUS. That is not an excerpt, that is the whole thing. The earliest capture in the record, from 2026-04-09, does not even carry an update number, just MECHAGODZILLA 2021 and SHOP.
What they never tell you is stats, abilities, unlock costs, or balance changes. Update 31 is the single exception in the entire history: it published three actual balance lines, including a max flight speed cut from 45 to 37. Every other number you have read about this game came from somewhere else, and for the most part that somewhere else made it up.
If what you actually want is to see everything added since the update you last played, the new kaiju tracker runs off this same record and answers that question directly. This page is the flat chronological version.
Each card carries the developer's own text and how it was sourced. Official text means an archived capture of the game description says so. Inferred means only the archived place name supports it, and the update number is a deduction.
These shipped. Players played them. Their contents are gone, because the description that announced each one was overwritten before anything captured it.
This is a hard ceiling, not a research failure. An earlier version of this page published contents for some of these, including an Update 25 entry about "Mothra Larvae" and arena matchmaking brackets, and a hotfix that never existed. None of it had a source. It has been removed rather than reworded, and the real Update 25 note, which says SHOWA MOTHRA and nothing about brackets, is in the log above.
If you find another site listing detailed notes for updates 22, 23, 26, 27 or any of the rest, that is the tell.
Roblox builds the game URL from the place name, and SULU KAKA renames the place to whatever is headlining. Those names are official, they were archived too, and they cover several windows the description captures missed. They carry no update number, so they prove a thing was live by a date and nothing more. They are also how the timed multiplier events get announced.
| Observed | Official place name |
|---|---|
| 2026-04-13 | Striker Eureka |
| 2026-04-14 | Kong 2017 |
| 2026-04-18 | Kiryu Type 3 |
| 2026-04-23 | Kong 2021 |
| 2026-04-26 | Suko |
| 2026-05-04 | Shimo |
| 2026-05-06 | SpaceGodzilla |
| 2026-05-08 | Monster Zero |
| 2026-05-10 | x1.5 Coin event, Destoroyah Form 4 |
| 2026-05-13 | Scylla |
| 2026-05-16 | X2 EXP event |
| 2026-05-23 | X2 XP event, Destoroyah |
| 2026-06-01 | X2 Rodan event |
| 2026-06-02 | Rodan |
| 2026-06-10 | Godzilla 2019, Jet Jaguar Beta, Gezora |
| 2026-06-16 | Gorosaurus |
| 2026-06-19 | Showa Minilla |
| 2026-06-24 | Kumonga |
| 2026-06-30 | Titanus Doug |
| 2026-07-05 | Showa Jet Jaguar |
| 2026-07-15 | Final Wars Godzilla |
| 2026-07-19 | Showa Gigan |
One source, checked directly: archived captures of the official Roblox game page at web.archive.org/web/{timestamp}/https://www.roblox.com/games/139769003880269/Kaiju-Alpha. Each capture is read for two things, the description text and the place name, and both go into the record with the capture date attached.
A capture proves the content was live at that moment. It does not tell you when it went live, and the description carries no dates of its own. Update 28 is the clearest case: there is no capture between 2026-05-27 and 2026-06-16, so Gorosaurus could have shipped anywhere in that three-week window. Every date on this page should be read as "live by", never as "released on".
It does not rate updates, assign tiers, or describe how anything performs, because no stats have ever been published for this game and measuring them would require play-testing this site does not do. It does not cite the auto-generated Kaiju Alpha wikis, which copy each other and get unlock prices wrong by roughly a factor of 1000, and it does not cite the 2022 fan wiki, which documents an earlier and since-rereleased version of the game.
Any update whose description window the archive does not happen to catch, and any change the developer makes without touching the description at all. Both have already happened. If you have a capture, a screenshot or a clip covering one of the gap updates, send it through the contact page and it goes into the record with its source attached.
This archive is retrospective. For the live answer to the Kaiju Alpha next update question and an explanation of why the archive cannot provide a release schedule, use the separate live-status page.
Update 39 added Showa Gigan. That is the entire official patch note, verbatim from the game description, and it has been live since 2026-07-19. No stats, abilities or unlock cost for Showa Gigan have been published by anyone.
There is no published schedule and the developer has never announced a date. The archived record shows a fast cadence through May and June, then a slowdown: Showa Jet Jaguar live by 2026-07-07, Final Wars Godzilla by 07-15, Showa Gigan by 07-19, and Showa Gigan still current on 2026-07-28. That is the longest stretch without a new release anywhere in the record, which is worth knowing but is not a prediction.
Because the record they would come from no longer exists. SULU KAKA publishes each update by overwriting the Roblox game description, so the previous note is destroyed when the next one goes up. The Internet Archive is the only thing preserving any of them, and it did not capture the page during updates 22, 23, 26, 27, 29, 30, 33, 34, 35 or 36. Searching harder does not recover them. Filling the gap with plausible-sounding patch notes would, and that is what several other sites have done.
Nowhere that persists. The Roblox game description is the only surface where update contents have ever been confirmed to appear, and it holds exactly one update at a time. There is also no dated release anywhere in the record, because the description carries no dates. Every date on this page is the date the content was observed live in an archived capture, which is an upper bound on the release date rather than the release date itself.
