diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e3c159ac..6f00f2bb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,6 +12,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  RA_HARDCORE: ${{ github.ref_type == 'tag' && 'true' || 'false' }}
 
 jobs:
   build-linux:
diff --git a/build.rs b/build.rs
index 0fb28314..e3e02742 100644
--- a/build.rs
+++ b/build.rs
@@ -272,6 +272,15 @@ fn main() {
     let git_hash = String::from_utf8(git_output.stdout).unwrap();
     println!("cargo:rustc-env=GIT_HASH={git_hash}");
 
+    println!("cargo:rerun-if-env-changed=NETPLAY_ID");
     let netplay_id = std::env::var("NETPLAY_ID").unwrap_or("gopher64".to_string());
     println!("cargo:rustc-env=NETPLAY_ID={netplay_id}");
+
+    println!("cargo:rerun-if-env-changed=RA_HARDCORE");
+    println!("cargo:rustc-check-cfg=cfg(ra_hardcore_enabled)");
+    if let Ok(ra_hardcore) = std::env::var("RA_HARDCORE")
+        && ra_hardcore.to_lowercase() == "true"
+    {
+        println!("cargo:rustc-cfg=ra_hardcore_enabled");
+    }
 }
diff --git a/src/main.rs b/src/main.rs
index abc8c1d5..5cd7a241 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -158,7 +158,11 @@ async fn main() -> std::io::Result<()> {
                 .unwrap_or_default()
         };
 
-        retroachievements::init_client(false); //args.ra_hardcore
+        if cfg!(ra_hardcore_enabled) {
+            retroachievements::init_client(args.ra_hardcore);
+        } else {
+            retroachievements::init_client(false);
+        }
         let mut shutdown_tx = None;
 
         if let Some(peer_addr) = args.netplay_peer_addr
diff --git a/src/ui/gui/retroachievements_page.slint b/src/ui/gui/retroachievements_page.slint
index 0bbb413d..884abbec 100644
--- a/src/ui/gui/retroachievements_page.slint
+++ b/src/ui/gui/retroachievements_page.slint
@@ -41,7 +41,7 @@ export component RetroAchievements inherits Page {
         HorizontalBox {
             alignment: center;
             CheckBox {
-                text: @tr("Hardcore mode (not currently supported)");
+                text: @tr("Hardcore mode");
                 checked: RAData.hardcore;
                 enabled: RAData.enabled;
                 toggled => {