add MetaInfo file

CMakeLists.txt

@@ -747,7 +747,10 @@ set(CPACK_INSTALL_CMAKE_PROJECTS
 
 include(CPack)
 
+configure_file(io.github.daid.EmptyEpsilon.metainfo.xml.in io.github.daid.EmptyEpsilon.metainfo.xml)
+
 if(UNIX AND NOT APPLE AND NOT STEAMSDK)
   install(FILES io.github.daid.EmptyEpsilon.desktop DESTINATION "share/applications")
   install(FILES logo512.png DESTINATION "share/icons/hicolor/512x512/apps" RENAME "io.github.daid.EmptyEpsilon.png")
+  install(FILES io.github.daid.EmptyEpsilon.metainfo.xml DESTINATION "share/metainfo")
 endif()

io.github.daid.EmptyEpsilon.metainfo.xml.in

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2024 daid -->
+<component type="desktop-application">
+  <id>io.github.daid.EmptyEpsilon</id>
+
+  <name>EmptyEpsilon</name>
+  <summary>Spaceship bridge simulator game</summary>
+
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-2.0-only AND LicenseRef-TurboSquid-Royalty-Free-License AND OFL-1.1 AND Apache-2.0</project_license>
+
+  <developer id="io.github.daid">
+    <name>daid</name>
+  </developer>
+
+  <description>
+    <p>EmptyEpsilon is a spaceship bridge simulator game. It&apos;s fully open source, so it can be modified in any way people wish.</p>
+    <p>EmptyEpsilon places you in the roles of a spaceship&apos;s bridge officers, like those seen in Star Trek. While you can play EmptyEpsilon alone or with friends, the best experience involves 6 players working together on each ship.</p>
+    <p>Each officer fills a unique role: Captain, Helms, Weapons, Relay, Science, and Engineering. Except for the Captain, each officer operates part of the ship through a specialized screen. The Captain relies on their trusty crew to report information and follow orders.</p>
+  </description>
+
+  <launchable type="desktop-id">io.github.daid.EmptyEpsilon.desktop</launchable>
+
+  <categories>
+    <category>Game</category>
+    <category>Simulation</category>
+  </categories>
+
+  <content_rating type="oars-1.1">
+    <content_attribute id="violence-fantasy">moderate</content_attribute>
+    <content_attribute id="social-chat">intense</content_attribute>
+    <content_attribute id="social-audio">intense</content_attribute>
+  </content_rating>
+
+  <url type="homepage">https://daid.github.io/EmptyEpsilon/</url>
+  <url type="bugtracker">https://github.com/daid/EmptyEpsilon/issues</url>
+  <url type="vcs-browser">https://github.com/daid/EmptyEpsilon/</url>
+
+  <screenshots>
+    <screenshot type="default">
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/mainscreen.png</image>
+      <caption>Main screen view from a cruiser during a large battle.</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/helms.png</image>
+      <caption>View of the helms officer's screen, which controls the ship's movement.</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/weapons.png</image>
+      <caption>View of the weapons officer's screen, which controls the ship's weapons and shields.</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/engineering.png</image>
+      <caption>View of the engineering officer's screen, which can allocate power and repairs to the ship's subsystems.</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/science.png</image>
+      <caption>View of the science officer's screen, which has long-range scanners and a large database of information.</caption>
+    </screenshot>
+    <screenshot>
+      <image>https://daid.github.io/EmptyEpsilon/screenshots/relay.png</image>
+      <caption>View of the relay officer's screen, which can see and hail allies, share their short-range radar, and launch remote probes.</caption>
+    </screenshot>
+  </screenshots>
+
+  <releases>
+    <release version="@MAJOR@.@MINOR@.@PATCH@" date="@MAJOR@-@MINOR@-@PATCH@" />
+  </releases>
+</component>