diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..13f64eb
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,46 @@
+version: 2.1
+executors:
+  unity_2018.3.12f1:
+    docker:
+      # https://hub.docker.com/r/gableroux/unity3d/tags
+      - image: gableroux/unity3d:2018.3.12f1
+commands:
+  unity_activate:
+      # requires: parameters.unity_version and parameters.unity_license.
+      # get activation file, if fail to activate unity, use this key and activate from https://license.unity3d.com/manual
+      - run: apt update && apt install libunwind8 -y
+      - run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -logFile -createManualActivationFile || exit 0
+      - run: cat  << parameters.unity_version >>.alf # file name same as image's version
+      # get from UNITY_LICENSE envvar(base64 encoded(cat foo.ulf | base64 )), this file is generated from above manual activation
+      - run: echo << parameters.unity_license >> | base64 -di  >> .circleci/Unity.ulf
+      - run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -manualLicenseFile .circleci/Unity.ulf || exit 0
+jobs:
+  build-and-test:
+    executor: unity_<< parameters.unity_version >>
+    steps:
+      - checkout
+      - unity_activate
+      # - run:
+      #     name: Build Linux(Mono)
+      #     command: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod UnitTestBuilder.BuildUnitTest /headless /ScriptBackend Mono2x /BuildTarget StandaloneLinux64
+      #     working_directory: src/RandomFixtureKit.Unity
+      # - run: src/RandomFixtureKit.Unity/bin/UnitTest/StandaloneLinux64_Mono2x/test
+  # build-and-create-package:
+  #   executor: unity
+  #   steps:
+  #     - checkout
+  #     - unity_activate
+  #     - run:
+  #         name: Export unitypackage
+  #         command: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod PackageExporter.Export
+  #         working_directory: src/MagicOnion.Client.Unity
+  #     - store_artifacts:
+  #         path: src/MagicOnion.Client.Unity/MagicOnion.Client.Unity.unitypackage
+  #         destination: /MagicOnion.Client.Unity.unitypackage
+workflows:
+  version: 2
+  build-unity:
+    jobs:
+      - build-unity-2017:
+        unity_version: 2018.3.12f1
+        unity_license: ${UNITY_LICENSE_2018_3}
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