diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..e52a8ad
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,282 @@
+cmake_minimum_required(VERSION 3.19)
+
+project(
+    ouo
+    SPDX_LICENSE MIT
+    HOMEPAGE_URL https://github.com/draxinar/ouo
+    LANGUAGES C
+)
+
+# List of optional flags
+option(OUO_32BIT OFF)
+option(OUO_ASAN OFF)
+option(OUO_VALGRIND OFF)
+option(OUO_WERROR OFF)
+option(OUO_SYSTEMD OFF)
+
+add_executable(${PROJECT_NAME})
+
+# Explicitly set C99 standard
+set_property(TARGET ${PROJECT_NAME} PROPERTY CMAKE_C_STANDARD 99)
+
+# Explicitly set which warnings to emit
+target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -Wpedantic)
+
+# Use git as source for version string
+find_package(Git QUIET)
+if(GIT_FOUND AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
+    execute_process(
+        COMMAND ${GIT_EXECUTABLE} describe --tags --always --dirty
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        OUTPUT_VARIABLE GIT_VERSION
+        ERROR_QUIET
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+else()
+    set(GIT_VERSION "unknown")
+endif()
+
+target_compile_definitions(
+    ${PROJECT_NAME}
+    PRIVATE
+        # Conform to POSIX.1-2008 base specification
+        _POSIX_C_SOURCE=200809L
+        # Version string
+        OUO_VERSION="${GIT_VERSION}"
+)
+
+#
+# Dependencies
+#
+
+# Find thread library on macOS/Windows
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+find_package(Threads)
+target_link_libraries(${PROJECT_NAME} PRIVATE Threads::Threads)
+
+# Find math library on *unix
+find_library(MATH_LIBRARY m)
+if(MATH_LIBRARY)
+    target_link_libraries(${PROJECT_NAME} PRIVATE ${MATH_LIBRARY})
+endif()
+
+#
+# Sources
+#
+
+target_sources(
+    ${PROJECT_NAME}
+    PRIVATE
+        account.c
+        account.h
+        anim.c
+        anim.h
+        bankdefs.c
+        bankdefs.h
+        bboard.c
+        bboard.h
+        blockmanager.c
+        blockmanager.h
+        blowfish.c
+        blowfish.h
+        book.c
+        book.h
+        channel.c
+        channel.h
+        combat.c
+        combat.h
+        config.c
+        config.h
+        container.c
+        container.h
+        containerhandle.c
+        containerhandle.h
+        convo.c
+        convo.h
+        corpse.c
+        corpse.h
+        cstring.c
+        cstring.h
+        dat.h
+        defcon.c
+        defcon.h
+        dice.c
+        dice.h
+        dynamic.c
+        dynamic.h
+        egg.c
+        egg.h
+        entity.c
+        entity.h
+        entitymanager.c
+        entitymanager.h
+        entitymap.c
+        entitymap.h
+        feature.c
+        feature.h
+        feistel.c
+        feistel.h
+        filemanager.c
+        filemanager.h
+        fns.c
+        fns.h
+        gamecentmon.c
+        gamecentmon.h
+        gmedit.c
+        gmedit.h
+        gm_names.h
+        help_queue.c
+        help_queue.h
+        huffman.c
+        huffman.h
+        io.c
+        io.h
+        item.c
+        item.h
+        list.c
+        listensocket.c
+        listensocket.h
+        list.h
+        load.c
+        load.h
+        location.c
+        location.h
+        log.c
+        log.h
+        magicfactory.c
+        magicfactory.h
+        magiclist.c
+        magiclist.h
+        main.c
+        main.h
+        mobile.c
+        mobile.h
+        multi.c
+        multi.h
+        nodepool.c
+        nodepool.h
+        npc.c
+        npc.h
+        objvar.c
+        objvar.h
+        packet_handler.c
+        packet_handler.h
+        packet_manager.c
+        packet_manager.h
+        packet_utils.c
+        packet_utils.h
+        pending_auth.c
+        pending_auth.h
+        player.c
+        player.h
+        random.c
+        random.h
+        region.c
+        region.h
+        resbank.c
+        resbank.h
+        res.c
+        res.h
+        resource_entity.c
+        resource_entity.h
+        resource_regrowth.c
+        resource_regrowth.h
+        resquery.c
+        resquery.h
+        scommand.c
+        scommand.h
+        serial_list.c
+        serial_list.h
+        sha256.c
+        sha256.h
+        shopkeeper.c
+        shopkeeper.h
+        signpost.c
+        signpost.h
+        skill.c
+        skill.h
+        socket.c
+        socket.h
+        stddeque.c
+        stddeque.h
+        stdlist.c
+        stdlist.h
+        stdptrlist.c
+        stdptrlist.h
+        stl.c
+        stl.h
+        streambuf.c
+        streambuf.h
+        taglist.c
+        taglist.h
+        template.c
+        template.h
+        terrain.c
+        terrain.h
+        time.c
+        time.h
+        timer.c
+        timer.h
+        trade.c
+        trade.h
+        twofish.c
+        twofish.h
+        usersock.c
+        usersock.h
+        ustring.c
+        ustring.h
+        utils.c
+        utils.h
+        version.c
+        version.h
+        vg_pool.h
+        vtable.c
+        vtable.h
+        watchdog.c
+        watchdog.h
+        weapon.c
+        weapon.h
+        weather.c
+        weather.h
+        wombat_builtins.inc
+        wombat.c
+        wombat_compile.c
+        wombat_compile.h
+        wombat_escript.c
+        wombat_escript.h
+        wombat_exec.c
+        wombat_exec.h
+        wombat.h
+        wombat_stl.c
+        wombat_stl.h
+        world.c
+        world.h
+)
+
+#
+# Option flags
+#
+
+if(OUO_32BIT)
+    target_link_options(${PROJECT_NAME} PRIVATE -m32)
+    target_compile_options(${PROJECT_NAME} PRIVATE -m32)
+endif()
+if(OUO_ASAN)
+    target_link_options(${PROJECT_NAME} PRIVATE -fsanitize=address)
+    target_compile_options(${PROJECT_NAME} PRIVATE -fsanitize=address)
+endif()
+if(OUO_VALGRIND)
+    target_compile_definitions(${PROJECT_NAME} PRIVATE VALGRIND=1)
+endif()
+if(OUO_WERROR)
+    target_compile_options(${PROJECT_NAME} PRIVATE -Werror)
+endif()
+if(OUO_SYSTEMD)
+    add_subdirectory(systemd)
+endif()
+
+#
+# Install
+#
+
+install(TARGETS ${PROJECT_NAME} DESTINATION /opt/ouo/run)
diff --git a/systemd/CMakeLists.txt b/systemd/CMakeLists.txt
new file mode 100644
index 0000000..00d4c4a
--- /dev/null
+++ b/systemd/CMakeLists.txt
@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.19)
+
+project(ouo_systemd)
+
+install(
+    FILES
+        ouo.service
+        ouo-backup.timer
+        ouo-backup.service
+        ouo-coredump@.service
+        ouo-status.timer
+        ouo-status.service
+    DESTINATION /usr/lib/systemd/system
+)
+install(
+    FILES ouo-backup.sh ouo-coredump.sh ouo-status.sh
+    DESTINATION /opt/ouo
+    PERMISSIONS
+        OWNER_EXECUTE
+        OWNER_WRITE
+        OWNER_READ
+        GROUP_READ
+        GROUP_EXECUTE
+        WORLD_READ
+        WORLD_EXECUTE
+)
+install(FILES ouo.default DESTINATION /etc/default RENAME ouo)
+install(FILES 50-ouo.rules DESTINATION /usr/share/polkit-1/rules.d)