diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
new file mode 100644
index 0000000000..1ce10fa6cd
--- /dev/null
+++ b/.github/workflows/cmake.yml
@@ -0,0 +1,87 @@
+name: CMake
+
+on:
+  pull_request:
+    branches: [ master ]
+
+env:
+  BUILD_TYPE: RelWithDebInfo
+
+jobs:
+  Ubuntu:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    
+    - name: Add OpenMW PPA Dependancies
+      run: sudo add-apt-repository ppa:openmw/openmw; sudo apt-get update
+    
+    - name: Install Building Dependancies
+      run: sudo CI/install_debian_deps.sh gcc openmw-deps openmw-deps-dynamic
+
+    - name: Prime ccache
+      uses: hendrikmuhs/ccache-action@v1
+      with:
+        key: ${{ matrix.os }}-${{ env.BUILD_TYPE }}
+        max-size: 1000M
+
+    - name: Install gtest
+      run: |
+        export CONFIGURATION="Release"
+        export GOOGLETEST_DIR="."
+        export GENERATOR="Unix Makefiles"
+        export CC="gcc"
+        export CXX="g++"
+        sudo -E CI/build_googletest.sh
+
+    - name: Configure
+      run: cmake -S . -B . -DGTEST_ROOT="$(pwd)/googletest/build" -DGMOCK_ROOT="$(pwd)/googletest/build" -DBUILD_UNITTESTS=ON -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DCMAKE_INSTALL_PREFIX=./install -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_FLAGS='-Werror' -DCMAKE_CXX_FLAGS="-Werror -Wno-error=deprecated-declarations -Wno-error=nonnull -Wno-error=deprecated-copy"
+
+    - name: Build
+      run: cmake --build . --config ${{env.BUILD_TYPE}} --parallel 3
+ 
+    - name: Test
+      run: ./openmw_test_suite
+
+#    - name: Install
+#      shell: bash
+#      run: cmake --install .
+      
+#    - name: Create Artifact
+#      shell: bash
+#      working-directory: install
+#      run: |
+#        ls -laR
+#        7z a ../build_artifact.7z .
+        
+#    - name: Upload Artifact
+#      uses: actions/upload-artifact@v1
+#      with:
+#        path: ./build_artifact.7z
+#        name: build_artifact.7z
+
+  MacOS:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install Building Dependancies
+      run: CI/before_install.osx.sh
+
+    - name: Prime ccache
+      uses: hendrikmuhs/ccache-action@v1
+      with:
+        key: ${{ matrix.os }}-${{ env.BUILD_TYPE }}
+        max-size: 1000M
+
+    - name: Configure
+      run: |
+        rm -fr build  # remove the build directory
+        CI/before_script.osx.sh
+
+    - name: Build
+      run: |
+        cd build 
+        make -j $(sysctl -n hw.logicalcpu) package