Quick answer

The oldest Jujutsu Kaisen (JJK) -themed game on Roblox that’s still widely referenced is Kaizen , which launched in 2021 and is often cited as the earliest major JJK experience on the platform.

That said, “oldest” can mean different things: first-ever upload, first with a certain name, or first that’s still playable. Below is a clearer breakdown.

What people usually mean by “oldest JJK game”

Because Roblox lets anyone publish games, many small or now-defunct JJK fangames may have appeared earlier but vanished or were renamed. In practice, the community tends to point to Kaizen when talking about the “original” or “oldest well-known” JJK game because:

  • It has a long development history and multiple major updates.
  • It was one of the first JJK games to gain a large playerbase and recognition.
  • It’s still actively discussed and played, unlike many early experiments that died out.

In videos that list “every JJK game,” Kaizen is typically shown alongside newer titles like Jujutsu Infinite , Sorcerer’s Legacy , Cursed Arena , and others—and it’s often framed as the veteran/OG of the genre on Roblox.

Other early-ish JJK Roblox games

Depending on how you define “JJK game,” some other early or notable entries include:

  • Kaizen – Frequently referenced as the earliest big JJK-style game; known for its fighting system and progression.
  • Jujutsu Infinite – Became massively popular later but is newer than Kaizen.
  • Sorcerer’s Legacy , Cursed Arena , Sukuna Battlegrounds , Limitless – These are all part of the newer wave of JJK games that appeared after the concept proved popular.

There may have been tiny or poorly documented JJK-themed places before Kaizen, but they either:

  • Got deleted or abandoned, or
  • Never gained enough traction to be remembered in community discussions and videos.

Why it’s hard to pin an exact “first”

A few reasons the exact oldest JJK game is fuzzy:

  • Roblox game IDs and titles change : Creators rename, rebrand, or delete games, so historical records are incomplete.
  • “JJK game” isn’t strictly defined : Some early experiences might have been simple maps, roleplays, or battle arenas with only loose JJK elements.
  • Community memory focuses on what survived : The games people remember as “first” are usually the ones that lasted and grew, not necessarily the literal first upload.

For context, the “oldest playable Roblox game” overall (not JJK-specific) that people have traced back is something like Rocket Mayhem from 2006, showing how far back some Roblox places go—but that’s unrelated to anime fangames.

So, which one should you call the oldest?

If you want a defensible, community-aligned answer:

  • Kaizen is widely treated as the oldest major JJK game on Roblox that still has name recognition and a documented presence.

If someone claims an even older JJK game exists, it’s likely:

  • A short-lived or renamed project, or
  • A very small experiment that never became part of the mainstream JJK-Roblox scene.

TL;DR

  • The oldest well-known JJK game on Roblox is generally considered to be Kaizen , which dates back to 2021 and is often treated as the OG of JJK experiences on the platform.
  • Newer hits like Jujutsu Infinite , Sorcerer’s Legacy , and Cursed Arena came later, even if they’re more popular now.

Information gathered from public forums or data available on the internet and portrayed here.