diff --git a/scripts/build_steam.sh b/scripts/build_steam.sh
new file mode 100755
index 00000000..5ff66849
--- /dev/null
+++ b/scripts/build_steam.sh
@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$SCRIPT_DIR/.."
+IMAGE="registry.gitlab.steamos.cloud/steamrt/sniper/sdk:latest"
+
+docker run --rm \
+  --platform linux/amd64 \
+  -v "$PROJECT_ROOT":/app \
+  -w /app \
+  "$IMAGE" \
+  bash -c '
+set -euo pipefail
+
+echo "==> Installing build dependencies..."
+apt-get update -qq
+apt-get install -y -qq \
+  clang cmake meson ninja-build pkg-config nasm git curl unzip xz-utils \
+  libgtk-3-dev liblzma-dev \
+  libasound2-dev libass-dev libfreetype-dev libfontconfig-dev libfribidi-dev libharfbuzz-dev \
+  libepoxy-dev libegl-dev libgl-dev libgnutls28-dev \
+  libpipewire-0.3-dev libva-dev libvdpau-dev \
+  libx11-dev libxext-dev libxrandr-dev libxcursor-dev libxi-dev libxss-dev libxpresent-dev \
+  libxkbcommon-dev libpulse-dev libdbus-1-dev libdrm-dev libgbm-dev \
+  libwayland-dev wayland-protocols liblcms2-dev python3-pip \
+
+pip3 install meson --upgrade
+
+echo ""
+echo "==> Building libmpv..."
+bash linux/packaging/build-libmpv.sh
+
+export PKG_CONFIG_PATH="$(pwd)/libmpv-prefix/lib/pkgconfig:$(pwd)/libmpv-prefix/lib/x86_64-linux-gnu/pkgconfig:${PKG_CONFIG_PATH:-}"
+
+echo ""
+echo "==> Installing Flutter..."
+git clone --depth 1 --branch stable https://github.com/flutter/flutter.git /opt/flutter
+export PATH="/opt/flutter/bin:$PATH"
+flutter --disable-analytics
+flutter config --no-cli-animations
+flutter precache --linux
+
+echo ""
+echo "==> Building Plezy..."
+flutter pub get
+flutter build linux --release --dart-define=ENABLE_UPDATE_CHECK=true
+
+echo ""
+echo "==> Assembling Steam bundle..."
+BUNDLE=build/linux/x64/release/bundle
+
+# Copy libmpv + shaderc into bundle
+BUNDLE_LIB="$BUNDLE/lib"
+LIBMPV_DIR=$(dirname "$(find libmpv-prefix -name libmpv.so | head -1)")
+cp -a "$LIBMPV_DIR"/libmpv.so* "$BUNDLE_LIB/"
+cp -a libmpv-prefix/lib/libshaderc_shared.so* "$BUNDLE_LIB/"
+
+# For Steam, do NOT run bundle-libs.sh — the runtime provides system libs.
+# Only verify the binary can resolve deps against the runtime.
+echo ""
+echo "==> Checking dependencies..."
+MISSING=$(LD_LIBRARY_PATH="$BUNDLE_LIB" ldd "$BUNDLE/plezy" 2>&1 | grep "not found" || true)
+if [[ -n "$MISSING" ]]; then
+  echo "WARNING: Unresolved dependencies (will need Steam runtime):"
+  echo "$MISSING"
+fi
+
+echo ""
+echo "==> Creating tarball..."
+cd "$BUNDLE"
+tar -czf /app/plezy-steam-linux-x64.tar.gz *
+
+echo ""
+echo "==> Done! Output: plezy-steam-linux-x64.tar.gz"
+'
diff --git a/scripts/steam_deploy.sh b/scripts/steam_deploy.sh
index 138885f2..0994c2bb 100755
--- a/scripts/steam_deploy.sh
+++ b/scripts/steam_deploy.sh
@@ -26,10 +26,14 @@ else
 fi
 mv "$WORK"/plezy-windows-x64-portable "$WORK/windows"
 
-echo "Downloading Linux build..."
-gh release download "$TAG" --repo "$REPO" -p "plezy-linux-x64.tar.gz" -D "$WORK"
+echo "Extracting Linux Steam build..."
+STEAM_TARBALL="$SCRIPT_DIR/../plezy-steam-linux-x64.tar.gz"
+if [[ ! -f "$STEAM_TARBALL" ]]; then
+    echo "Error: $STEAM_TARBALL not found. Run build_steam.sh first." >&2
+    exit 1
+fi
 mkdir -p "$WORK/linux"
-tar xzf "$WORK/plezy-linux-x64.tar.gz" -C "$WORK/linux"
+tar xzf "$STEAM_TARBALL" -C "$WORK/linux"
 
 # Generate VDF files
 cat > "$WORK/app_build.vdf" <<EOF