diff --git a/lib/modules/versioning/api.ts b/lib/modules/versioning/api.ts
index aaf75903ff3150..a2f52a8a738243 100644
--- a/lib/modules/versioning/api.ts
+++ b/lib/modules/versioning/api.ts
@@ -36,6 +36,7 @@ import * as semverCoerced from './semver-coerced';
 import * as swift from './swift';
 import type { VersioningApi, VersioningApiConstructor } from './types';
 import * as ubuntu from './ubuntu';
+import * as unity3d from './unity3d';
 
 const api = new Map<string, VersioningApi | VersioningApiConstructor>();
 export default api;
@@ -77,3 +78,4 @@ api.set(semver.id, semver.api);
 api.set(semverCoerced.id, semverCoerced.api);
 api.set(swift.id, swift.api);
 api.set(ubuntu.id, ubuntu.api);
+api.set(unity3d.id, unity3d.api);
diff --git a/lib/modules/versioning/unity3d/index.spec.ts b/lib/modules/versioning/unity3d/index.spec.ts
new file mode 100644
index 00000000000000..9e9bd324ed7275
--- /dev/null
+++ b/lib/modules/versioning/unity3d/index.spec.ts
@@ -0,0 +1,64 @@
+import unity3d from '.';
+
+describe('modules/versioning/unity3d/index', () => {
+  it.each`
+    input                           | expected
+    ${'9.0.3'}                      | ${false}
+    ${'1.2019.3.22'}                | ${false}
+    ${'3.0.0-beta'}                 | ${false}
+    ${'2.0.2-pre20191018090318'}    | ${false}
+    ${'1.0.0+c30d7625'}             | ${false}
+    ${'2.3.4-beta+1990ef74'}        | ${false}
+    ${'17.04'}                      | ${false}
+    ${'3.0.0.beta'}                 | ${false}
+    ${'5.1.2-+'}                    | ${false}
+    ${'2022.2.12f1 (1234567890ab)'} | ${true}
+    ${'2022.2.11 (1234567890ab)'}   | ${false}
+    ${'2021.1.10p1 (1234567890ab)'} | ${true}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${true}
+    ${'2021.1.1a1 (1234567890ab)'}  | ${true}
+  `('isValid("$input") === $expected', ({ input, expected }) => {
+    const res = !!unity3d.isValid(input);
+    expect(res).toBe(expected);
+  });
+
+  it.each`
+    input                           | expected
+    ${'2022.2.12f1 (1234567890ab)'} | ${true}
+    ${'2021.1.10p1 (1234567890ab)'} | ${false}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${false}
+    ${'2021.1.1a1 (1234567890ab)'}  | ${false}
+  `('isStable("$input") === $expected', ({ input, expected }) => {
+    expect(unity3d.isStable(input)).toBe(expected);
+  });
+
+  it.each`
+    a                               | b                               | expected
+    ${'2022.2.12f1 (1234567890ab)'} | ${'2022.2.12f1 (1234567890ab)'} | ${true}
+    ${'2021.1.10p1 (1234567890ab)'} | ${'2021.1.10p1 (1234567890ab)'} | ${true}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${'2021.1.9b1 (1234567890ab)'}  | ${true}
+    ${'2021.1.1a1 (1234567890ab)'}  | ${'2021.1.1a1 (1234567890ab)'}  | ${true}
+  `('equals($a, $b) === $expected', ({ a, b, expected }) => {
+    expect(unity3d.equals(a, b)).toBe(expected);
+  });
+
+  it.each`
+    a                               | b                               | expected
+    ${'2022.2.12f1 (1234567890ab)'} | ${'2022.2.12b1 (1234567890ab)'} | ${true}
+    ${'2022.2.12f1 (1234567890ab)'} | ${'2021.1.10p1 (1234567890ab)'} | ${true}
+    ${'2021.1.10p1 (1234567890ab)'} | ${'2021.1.9b1 (1234567890ab)'}  | ${true}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${'2021.1.1a1 (1234567890ab)'}  | ${true}
+    ${'2021.1.10p1 (1234567890ab)'} | ${'2022.2.12f1 (1234567890ab)'} | ${false}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${'2021.1.10p1 (1234567890ab)'} | ${false}
+    ${'2021.1.1a1 (1234567890ab)'}  | ${'2021.1.9b1 (1234567890ab)'}  | ${false}
+    ${'2022.2.12b1 (1234567890ab)'} | ${'2022.2.12f1 (1234567890ab)'} | ${false}
+    ${'2021.1.10p1 (1234567890ab)'} | ${'2022.2.12f1 (1234567890ab)'} | ${false}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${'2021.1.10p1 (1234567890ab)'} | ${false}
+    ${'2021.1.1a1 (1234567890ab)'}  | ${'2021.1.9b1 (1234567890ab)'}  | ${false}
+    ${'2022.2.12f1 (1234567890ab)'} | ${'2021.1.10p1 (1234567890ab)'} | ${true}
+    ${'2021.1.10p1 (1234567890ab)'} | ${'2021.1.9b1 (1234567890ab)'}  | ${true}
+    ${'2021.1.9b1 (1234567890ab)'}  | ${'2021.1.1a1 (1234567890ab)'}  | ${true}
+  `('isGreaterThan($a, $b) === $expected', ({ a, b, expected }) => {
+    expect(unity3d.isGreaterThan(a, b)).toBe(expected);
+  });
+});
diff --git a/lib/modules/versioning/unity3d/index.ts b/lib/modules/versioning/unity3d/index.ts
new file mode 100644
index 00000000000000..07d0e3284fab32
--- /dev/null
+++ b/lib/modules/versioning/unity3d/index.ts
@@ -0,0 +1,50 @@
+import { regEx } from '../../../util/regex';
+import { GenericVersion, GenericVersioningApi } from '../generic';
+import type { VersioningApi } from '../types';
+
+export const id = 'unity3d';
+export const displayName = 'Unity3D';
+export const urls = [
+  'https://docs.unity3d.com/Manual/ScriptCompilationAssemblyDefinitionFiles.html#version-define-expressions',
+];
+export const supportsRanges = false;
+
+class Unity3dVersioningApi extends GenericVersioningApi {
+  private static readonly parsingRegex = regEx(
+    /^(?<major>\d+)\.(?<minor>\d+)\.(?<patch>\d+)(?<releaseStream>\w)(?<build>\d+)/,
+  );
+
+  private static readonly ReleaseStreamType = [
+    'a', // Alpha
+    'b', // Beta
+    'p', // Patch
+    'x', // Experimental
+    'f', // Stable
+    'c', // Stable (China)
+  ];
+  private static readonly stableVersions = ['f', 'c'];
+
+  protected _parse(version: string): GenericVersion | null {
+    const matches = Unity3dVersioningApi.parsingRegex.exec(version);
+    if (!matches?.groups) {
+      return null;
+    }
+    const { major, minor, patch, releaseStream, build } = matches.groups;
+
+    const release = [
+      parseInt(major, 10),
+      parseInt(minor, 10),
+      parseInt(patch, 10),
+      Unity3dVersioningApi.ReleaseStreamType.indexOf(releaseStream),
+      parseInt(build, 10),
+    ];
+    const isStable =
+      Unity3dVersioningApi.stableVersions.includes(releaseStream);
+
+    return { release, prerelease: isStable ? undefined : build };
+  }
+}
+
+export const api: VersioningApi = new Unity3dVersioningApi();
+
+export default api;
diff --git a/lib/modules/versioning/unity3d/readme.md b/lib/modules/versioning/unity3d/readme.md
new file mode 100644
index 00000000000000..537f80fc6123ed
--- /dev/null
+++ b/lib/modules/versioning/unity3d/readme.md
@@ -0,0 +1,13 @@
+Unity versioning follow semantic versioning, followed by a letter, number and an optional hash:
+
+- Major version is the year of release
+- Minor and patch version are incremental, starting at 0
+- The letter denotes a stream (**a**lpha, **b**eta, **f**inal release, etc.)
+- The number is a growing index
+- The hash is calculated by Unity internally and irrelevant for comparision
+
+Examples:
+
+- `2023.2.10f1 (316c1fd686f6)`
+- `2023.3.0a17`
+- `2023.3.0b4 (2cd31b2a2ee2)`