diff --git a/games-engines/fs2_open/Manifest b/games-engines/fs2_open/Manifest
index 2849504ff0..6bd2946a4f 100644
--- a/games-engines/fs2_open/Manifest
+++ b/games-engines/fs2_open/Manifest
@@ -1,3 +1,6 @@
 DIST fs2_open-24.2.0-ext_libRocket.tar.gz 2417905 BLAKE2B 0e5ac40b0e811b9213fb84f6f2f0ef38ad7d562ae671e865d96e40615c2d67213905ce153a69192c0b53a3e4f0d1aef077c0769e46d308adf9210c0c9d1fe7c2 SHA512 700e242ecb5207faf729ca7d23ac4f28be819c0ef7a0ba51ca18de1592f1016040cd5e4c1c75a573f91cea69dd43549966ac089804a52c0f1b0cfbaabefc4346
 DIST fs2_open-24.2.0-ext_rpavlik-cmake-modules.tar.gz 267464 BLAKE2B d63fa3867aad5fad7bd5d20845dd8d6a6698d59dc30dc511704f3c74bbe958bb6d36160bae3ef5c01027719c50d18e4d24209ea5811c6a52c5af4d3de2a587e9 SHA512 0bb03e2a1c0cafa80849163455cdb5fc5c7200e51f18f0354c36f251b51156f86a04a9f87cd17e2942d14ae8767d8df756062fbcff9b37f04e8399b2e37d306f
 DIST fs2_open-24.2.0.tar.gz 10958574 BLAKE2B 1990e7536ce71e1408806af60a8d6908ac23ba4137f26072610ab8259b17934930a7f6bfe2a3df5ab6a33aa2a6714d28c390ed49dca1a0fe04757bf1addff2ff SHA512 4aa7420c6120568f1f414e719b56948329b1ccaeb01c63a012a28e4129d8365782e7ca54b7f5fde1157471de3c9d07943a111db042dcc21eabef0cc5c5722703
+DIST fs2_open-25.0.0-ext_libRocket.tar.gz 2417905 BLAKE2B 0e5ac40b0e811b9213fb84f6f2f0ef38ad7d562ae671e865d96e40615c2d67213905ce153a69192c0b53a3e4f0d1aef077c0769e46d308adf9210c0c9d1fe7c2 SHA512 700e242ecb5207faf729ca7d23ac4f28be819c0ef7a0ba51ca18de1592f1016040cd5e4c1c75a573f91cea69dd43549966ac089804a52c0f1b0cfbaabefc4346
+DIST fs2_open-25.0.0-ext_rpavlik-cmake-modules.tar.gz 267464 BLAKE2B d63fa3867aad5fad7bd5d20845dd8d6a6698d59dc30dc511704f3c74bbe958bb6d36160bae3ef5c01027719c50d18e4d24209ea5811c6a52c5af4d3de2a587e9 SHA512 0bb03e2a1c0cafa80849163455cdb5fc5c7200e51f18f0354c36f251b51156f86a04a9f87cd17e2942d14ae8767d8df756062fbcff9b37f04e8399b2e37d306f
+DIST fs2_open-25.0.0.tar.gz 11459432 BLAKE2B 88847584355fe2bbb5ca8d507a47ad6bebcc6fbe4b35618f79d15c148fec6ec971b35bfebec339b17cf67c221ac136444a7028bea06fafb33d58b5b043340688 SHA512 7431977d27adda96b9c1d53bf805997098f44c8e94bcc9fa99460d059161ab5270e2810206b6a6c79bfb92d75f80d1277825516f284511d344d485d3208a40aa
diff --git a/games-engines/fs2_open/files/fs2_open-25.0.0-dont-build-lz4.patch b/games-engines/fs2_open/files/fs2_open-25.0.0-dont-build-lz4.patch
new file mode 100644
index 0000000000..4d6f5f9aba
--- /dev/null
+++ b/games-engines/fs2_open/files/fs2_open-25.0.0-dont-build-lz4.patch
@@ -0,0 +1,11 @@
+--- a/lib/CMakeLists.txt
++++ b/lib/CMakeLists.txt
+@@ -49,8 +49,6 @@ add_subdirectory(mdns)
+ 
+ add_subdirectory(accidental-noise)
+ 
+-ADD_SUBDIRECTORY(lz4)
+-
+ set(HIDAPI_WITH_LIBUSB OFF)
+ set(HIDAPI_WITH_HIDRAW ON)
+ add_subdirectory(hidapi)
diff --git a/games-engines/fs2_open/files/fs2_open-25.0.0-make-arch-independent.patch b/games-engines/fs2_open/files/fs2_open-25.0.0-make-arch-independent.patch
new file mode 100644
index 0000000000..04fbf7eb26
--- /dev/null
+++ b/games-engines/fs2_open/files/fs2_open-25.0.0-make-arch-independent.patch
@@ -0,0 +1,11 @@
+--- a/freespace2/CMakeLists.txt
++++ b/freespace2/CMakeLists.txt
+@@ -25,7 +25,7 @@ target_compile_features(Freespace2 PUBLIC cxx_std_17)
+ 
+ include(resources.cmake)
+ 
+-SET_TARGET_PROPERTIES(Freespace2 PROPERTIES OUTPUT_NAME "fs2_open_${FSO_BINARY_SUFFIX}")
++SET_TARGET_PROPERTIES(Freespace2 PROPERTIES OUTPUT_NAME "fs2_open")
+ 
+ TARGET_LINK_LIBRARIES(Freespace2 code)
+ TARGET_LINK_LIBRARIES(Freespace2 platform)
diff --git a/games-engines/fs2_open/fs2_open-25.0.0.ebuild b/games-engines/fs2_open/fs2_open-25.0.0.ebuild
new file mode 100644
index 0000000000..1678e3d7e3
--- /dev/null
+++ b/games-engines/fs2_open/fs2_open-25.0.0.ebuild
@@ -0,0 +1,107 @@
+# Copyright 2022-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake flag-o-matic
+
+DESCRIPTION="FreeSpace2 Source Code Project game engine"
+HOMEPAGE="https://github.com/scp-fs2open/fs2open.github.com/"
+
+# Replace "." with "_" in version
+_PV=${PV//./_}
+
+# Current hashes of external repositories:
+HASH_LIBROCKET="ecd648a43aff8a9f3daf064d75ca5725237d5b38"
+HASH_CMAKE_MODULES="7cef9577d6fc35057ea57f46b4986a8a28aeff50"
+
+SRC_URI="
+	https://github.com/scp-fs2open/fs2open.github.com/archive/refs/tags/release_${_PV}.tar.gz -> ${P}.tar.gz
+	https://github.com/scp-fs2open/libRocket/archive/${HASH_LIBROCKET}.tar.gz -> ${P}-ext_libRocket.tar.gz
+	https://github.com/asarium/cmake-modules/archive/${HASH_CMAKE_MODULES}.tar.gz -> ${P}-ext_rpavlik-cmake-modules.tar.gz
+"
+
+S="${WORKDIR}/fs2open.github.com-release_${_PV}"
+
+LICENSE="Unlicense MIT Boost-1.0"
+SLOT="0"
+KEYWORDS="~amd64"
+
+IUSE="clang debug discord"
+
+DEPEND="
+	app-arch/lz4:=
+	<dev-lang/lua-5.1.6:5.1
+	dev-libs/jansson:=
+	media-libs/freetype:2
+	media-libs/glu
+	media-libs/libjpeg-turbo:=
+	media-libs/libpng:=
+	media-libs/libsdl2[X]
+	media-libs/libtheora
+	media-libs/libvorbis
+	media-libs/mesa
+	media-libs/openal
+	media-video/ffmpeg:=
+	x11-libs/libX11
+"
+RDEPEND="${DEPEND}"
+BDEPEND="
+	clang? ( llvm-core/clang )
+"
+PATCHES=(
+	"${FILESDIR}/${P}-dont-build-lz4.patch"
+	"${FILESDIR}/${P}-make-arch-independent.patch"
+)
+
+src_unpack() {
+	unpack ${A}
+	mv libRocket-${HASH_LIBROCKET}/* "${S}/lib/libRocket/" || die
+	mv cmake-modules-${HASH_CMAKE_MODULES}/* "${S}/cmake/external/rpavlik-cmake-modules/" || die
+}
+
+src_prepare() {
+	eapply_user
+	cmake_src_prepare
+}
+
+src_configure() {
+	use debug && CMAKE_BUILD_TYPE=Debug || CMAKE_BUILD_TYPE=Release
+
+	if use clang ; then
+		# Force clang
+		einfo "Enforcing the use of clang due to USE=clang ..."
+		AR=llvm-ar
+		CC=${CHOST}-clang
+		CXX=${CHOST}-clang++
+		LDFLAGS+=" -fuse-ld=lld"
+	fi
+
+	# Force-include prefix_header.h (simulate -DCMAKE_PCH which doesn't work)
+	append-cxxflags "-include${S}/code/prefix_header.h"
+
+	local mycmakeargs=(
+		"-DFSO_BUILD_WITH_DISCORD=$(usex discord ON OFF)"
+		"-DCMAKE_DISABLE_PRECOMPILE_HEADERS=ON"
+	)
+
+	cmake_src_configure
+}
+
+src_install() {
+	exeinto "/opt/${PN}"
+	doexe "${BUILD_DIR}/bin/${PN}"
+	insinto "/opt/${PN}"
+	doins "${BUILD_DIR}/bin/libRocketControls.so"
+	doins "${BUILD_DIR}/bin/libRocketControlsLua.so"
+	doins "${BUILD_DIR}/bin/libRocketCore.so"
+	doins "${BUILD_DIR}/bin/libRocketCoreLua.so"
+	doins "${BUILD_DIR}/bin/libRocketDebugger.so"
+	use discord && doins "${BUILD_DIR}/bin/libdiscord-rpc.so"
+}
+
+pkg_postinst() {
+	einfo "This package only generates the engine binary."
+	einfo "The retail Freespace 2 data is required to play the"
+	einfo "original game and most mods."
+}