diff --git a/games-fps/ut2004-bonuspack-xp/Manifest b/games-fps/ut2004-bonuspack-xp/Manifest
new file mode 100644
index 0000000000000..e891802ac7d77
--- /dev/null
+++ b/games-fps/ut2004-bonuspack-xp/Manifest
@@ -0,0 +1 @@
+DIST UT2004-ONSBonusMapPack.zip 11018471 BLAKE2B bc915d6942c321df4031b02eaa25f83793b3fa1f2bb916c5d413c5569a3f887b6517fc4dceb8cb914e22be62f58512e727a41d5efbc6066113be12a9da9621d0 SHA512 8193375b89cd6fbc8b00de195797099c128fcf5cb73757bbc57d3c5350c497a878eaf0200f2e0711bf062e25c5d170e05b055c63f85b908b18dcc89572d71fd2
diff --git a/games-fps/ut2004-bonuspack-xp/metadata.xml b/games-fps/ut2004-bonuspack-xp/metadata.xml
new file mode 100644
index 0000000000000..1c3ba213c494a
--- /dev/null
+++ b/games-fps/ut2004-bonuspack-xp/metadata.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+<maintainer type="project">
+	<email>games@gentoo.org</email>
+	<name>Gentoo Games Project</name>
+</maintainer>
+</pkgmetadata>
diff --git a/games-fps/ut2004-bonuspack-xp/ut2004-bonuspack-xp-1.ebuild b/games-fps/ut2004-bonuspack-xp/ut2004-bonuspack-xp-1.ebuild
new file mode 100644
index 0000000000000..d80023c009ff6
--- /dev/null
+++ b/games-fps/ut2004-bonuspack-xp/ut2004-bonuspack-xp-1.ebuild
@@ -0,0 +1,41 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=9
+
+DESCRIPTION="UT2004 XP Bonus Maps"
+HOMEPAGE="https://liandri.beyondunreal.com/Unreal_Tournament_2004"
+SRC_URI="http://unrealmassdestruction.com/downloads/ut2k4/essentials/UT2004-ONSBonusMapPack.zip"
+S="${WORKDIR}"
+
+LICENSE="free-noncomm"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64"
+RESTRICT="strip"
+
+BDEPEND="
+	app-arch/unzip
+	>=games-fps/ut2004-3374_pre23
+"
+RDEPEND="
+	games-fps/ut2004-data
+	!games-fps/ut2004-bonuspack-ece
+"
+
+src_unpack() {
+	mkdir Maps || die
+	cd Maps || die
+	default
+}
+
+src_compile() {
+	ut2004-ucc exportcache -mod=Gentoo Maps/*.ut2 || die
+	# The base game already knows about these maps, so it writes the cache to a
+	# single file rather than separate ones. We must rename to avoid a conflict.
+	mv -v System/{CacheRecords,${PN}}.ucl || die
+}
+
+src_install() {
+	insinto /opt/ut2004
+	doins -r *
+}