diff --git a/games-emulation/4do_libretro/4do_libretro-1.3.2.4_20180219.recipe b/games-emulation/4do_libretro/4do_libretro-1.3.2.4_20180219.recipe
deleted file mode 100644
index 679413e62..000000000
--- a/games-emulation/4do_libretro/4do_libretro-1.3.2.4_20180219.recipe
+++ /dev/null
@@ -1,51 +0,0 @@
-SUMMARY="A port of 4DO, a 3DO emulator to the libretro architecture"
-DESCRIPTION="4DO is an open-source, low-level emulator for the Panasonic 3DO, based on the FreeDO source code."
-HOMEPAGE="http://www.fourdo.com/"
-COPYRIGHT="2011-2018 the 4DO/FreeDO team, the libretro team"
-LICENSE="FreeDO
-	GNU LGPL v3"
-REVISION="1"
-srcGitRev="12eba56e3ddb1cd3c53bf26f62adeca7cc0389af"
-SOURCE_URI="https://github.com/libretro/4do-libretro/archive/$srcGitRev.tar.gz"
-CHECKSUM_SHA256="1aee495919d1cc0f71f965c1d6fc61a548cad36f1826aaf52207c0650dbf2886"
-SOURCE_FILENAME="libretro-4do-$portVersion-$srcGitRev.tar.gz"
-SOURCE_DIR="4do-libretro-$srcGitRev"
-ADDITIONAL_FILES="4do_libretro.info.in"
-
-ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
-SECONDARY_ARCHITECTURES="x86"
-
-PROVIDES="
-	4do_libretro$secondaryArchSuffix = $portVersion
-	addon:4do_libretro$secondaryArchSuffix = $portVersion
-	"
-REQUIRES="
-	haiku$secondaryArchSuffix
-	retroarch$secondaryArchSuffix
-	"
-
-BUILD_REQUIRES="
-	haiku${secondaryArchSuffix}_devel
-	"
-BUILD_PREREQUIRES="
-	cmd:gcc$secondaryArchSuffix
-	cmd:make
-	"
-
-BUILD()
-{
-	sed -e "s/@DISPLAY_VERSION@/v${portVersion/_/-}/" \
-		$portDir/additional-files/4do_libretro.info.in \
-		> 4do_libretro.info
-	make $jobArgs
-}
-
-INSTALL()
-{
-	install -m 0755 -d "$docDir"
-	install -m 0644 -t "$docDir" README.md
-	install -m 0755 -d "$addOnsDir"/libretro
-	install -m 0644 -t "$addOnsDir"/libretro \
-		4do_libretro.info \
-		4do_libretro.so
-}
diff --git a/games-emulation/4do_libretro/additional-files/4do_libretro.info.in b/games-emulation/4do_libretro/additional-files/4do_libretro.info.in
deleted file mode 100644
index 06ce9322d..000000000
--- a/games-emulation/4do_libretro/additional-files/4do_libretro.info.in
+++ /dev/null
@@ -1,17 +0,0 @@
-display_name = "The 3DO Company - 3DO (4DO)"
-authors = "JohnnyDude|FreeDO team"
-supported_extensions = "iso|cue"
-corename = "4DO"
-manufacturer = "Various"
-categories = "Emulator"
-systemname = "3DO"
-database = "The 3DO Company - 3DO"
-license = "FreeDO"
-permissions = ""
-display_version = "@DISPLAY_VERSION@"
-supports_no_game = "false"
-firmware_count = 1
-firmware0_desc = "panafz10.bin (Panasonic FZ-10 BIOS)"
-firmware0_path = "panafz10.bin"
-firmware0_opt = "false"
-notes = "(!) panafz10.bin (md5): 51f2f43ae2f3508a14d9f56597e2d3ce"
diff --git a/games-emulation/opera_libretro/additional-files/opera_libretro.info.in b/games-emulation/opera_libretro/additional-files/opera_libretro.info.in
new file mode 100644
index 000000000..579d87b92
--- /dev/null
+++ b/games-emulation/opera_libretro/additional-files/opera_libretro.info.in
@@ -0,0 +1,86 @@
+# Software Information
+display_name = "The 3DO Company - 3DO (Opera)"
+authors = "trapexit|JohnnyDude|FreeDO team"
+supported_extensions = "iso|bin|chd|cue"
+corename = "Opera"
+categories = "Emulator"
+license = "LGPL/Non-commercial"
+permissions = ""
+display_version = "@DISPLAY_VERSION@"
+
+# Hardware Information
+manufacturer = "Panasonic|GoldStar|Sanyo"
+systemname = "3DO"
+systemid = "3do"
+
+# Libretro Features
+database = "The 3DO Company - 3DO"
+supports_no_game = "true"
+savestate = "true"
+savestate_features = "basic"
+cheats = "false"
+input_descriptors = "true"
+memory_descriptors = "false"
+libretro_saves = "true"
+core_options = "true"
+load_subsystem = "false"
+hw_render = "false"
+needs_fullpath = "true"
+disk_control = "false"
+is_experimental = "false"
+
+# BIOS/Firmware
+firmware_count = 13
+
+firmware0_desc = "panafz1.bin (Panasonic FZ-1 BIOS)"
+firmware0_path = "panafz1.bin"
+firmware0_opt = "true"
+
+firmware1_desc = "panafz10.bin (Panasonic FZ-10 BIOS)"
+firmware1_path = "panafz10.bin"
+firmware1_opt = "true"
+
+firmware2_desc = "panafz10-norsa.bin (Panasonic FZ-10 BIOS [Encryption Check Disabled])"
+firmware2_path = "panafz10-norsa.bin"
+firmware2_opt = "true"
+
+firmware3_desc = "panafz10e-anvil.bin (Panasonic FZ-10E ANVIL BIOS)"
+firmware3_path = "panafz10e-anvil.bin"
+firmware3_opt = "true"
+
+firmware4_desc = "panafz10e-anvil-norsa.bin (Panasonic FZ-10E ANVIL BIOS [Encryption Check Disabled])"
+firmware4_path = "panafz10e-anvil-norsa.bin"
+firmware4_opt = "true"
+
+firmware5_desc = "goldstar.bin (Goldstar GDO-101M BIOS)"
+firmware5_path = "goldstar.bin"
+firmware5_opt = "true"
+
+firmware6_desc = "sanyotry.bin (Sanyo Try IMP-21J BIOS)"
+firmware6_path = "sanyotry.bin"
+firmware6_opt = "true"
+
+firmware7_desc = "3do_arcade_saot.bin (Shootout At Old Tucson BIOS)"
+firmware7_path = "3do_arcade_saot.bin"
+firmware7_opt = "true"
+
+firmware8_desc = "panafz1-kanji.bin (Panasonic FZ-1 Kanji Font ROM)"
+firmware8_path = "panafz1-kanji.bin"
+firmware8_opt = "true"
+firmware9_desc = "panafz10ja-anvil-kanji.bin (Panasonic FZ-10JA Kanji Font ROM)"
+firmware9_path = "panafz10ja-anvil-kanji.bin"
+firmware9_opt = "true"
+
+firmware10_desc = "panafz1j.bin (Panasonic FZ-1J BIOS)"
+firmware10_path = "panafz1j.bin"
+firmware10_opt = "true"
+
+firmware11_desc = "panafz1j-norsa.bin (Panasonic FZ-1J BIOS [Encryption Check Disabled])"
+firmware11_path = "panafz1j-norsa.bin"
+firmware11_opt = "true"
+
+firmware12_desc = "panafz1j-kanji.bin (Panasonic FZ-1J Kanji Font ROM)"
+firmware12_path = "panafz1j-kanji.bin"
+firmware12_opt = "true"
+
+notes = "(!) panafz1.bin (md5): f47264dd47fe30f73ab3c010015c155b|(!) panafz10.bin (md5): 51f2f43ae2f3508a14d9f56597e2d3ce|(!) panafz10-norsa.bin (md5): 1477bda80dc33731a65468c1f5bcbee9|(!) panafz10e-anvil.bin (md5): a48e6746bd7edec0f40cff078f0bb19f|(!) panafz10e-anvil-norsa.bin (md5): cf11bbb5a16d7af9875cca9de9a15e09|(!) goldstar.bin (md5): 8639fd5e549bd6238cfee79e3e749114|(!) sanyotry.bin (md5): 35fa1a1ebaaeea286dc5cd15487c13ea|(!) 3do_arcade_saot.bin (md5): 8970fc987ab89a7f64da9f8a8c4333ff|(!) panafz1-kanji.bin (md5): b8dc97f778a6245c58e064b0312e8281|(!) panafz10ja-anvil-kanji.bin (md5): 428577250f43edc902ea239c50d2240d|(!) panafz1j.bin (md5): a496cfdded3da562759be3561317b605|(!) panafz1j-norsa.bin (md5): f6c71de7470d16abe4f71b1444883dc8|(!) panafz1j-kanji.bin (md5): c23fb5d5e6bb1c240d02cf968972be37"
diff --git a/games-emulation/4do_libretro/licenses/FreeDO b/games-emulation/opera_libretro/licenses/FreeDO
similarity index 100%
rename from games-emulation/4do_libretro/licenses/FreeDO
rename to games-emulation/opera_libretro/licenses/FreeDO
diff --git a/games-emulation/opera_libretro/opera_libretro-1.0.0_20200521.recipe b/games-emulation/opera_libretro/opera_libretro-1.0.0_20200521.recipe
new file mode 100644
index 000000000..c6d53618f
--- /dev/null
+++ b/games-emulation/opera_libretro/opera_libretro-1.0.0_20200521.recipe
@@ -0,0 +1,54 @@
+SUMMARY="A fork of 4DO, a 3DO emulator to the libretro architecture"
+DESCRIPTION="Opera is a fork of 4DO, originally a port of 4DO, itself a fork \
+of FreeDO, to libretro. The fork/rename occurred due to the original 4DO \
+project being dormant and to differenciate the project due to new development \
+and focus."
+HOMEPAGE="https://github.com/libretro/opera-libretro"
+COPYRIGHT="2011-2020 the 4DO/FreeDO team, the libretro team"
+LICENSE="FreeDO
+	GNU LGPL v3"
+REVISION="1"
+srcGitRev="f0b1932e6f0a24a5eb443837b8e63de925ab0151"
+SOURCE_URI="https://github.com/libretro/opera-libretro/archive/$srcGitRev.tar.gz"
+CHECKSUM_SHA256="23d737e511175b15b2126cb1f5617691fbe6a764c0c5a6213a98a5b13b409816"
+SOURCE_FILENAME="libretro-opera-$portVersion-$srcGitRev.tar.gz"
+SOURCE_DIR="opera-libretro-$srcGitRev"
+ADDITIONAL_FILES="opera_libretro.info.in"
+
+ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	opera_libretro$secondaryArchSuffix = $portVersion
+	addon:opera_libretro$secondaryArchSuffix = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	retroarch$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	"
+BUILD_PREREQUIRES="
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	"
+
+BUILD()
+{
+	sed -e "s/@DISPLAY_VERSION@/v${portVersion/_/-}/" \
+		$portDir/additional-files/opera_libretro.info.in \
+		> opera_libretro.info
+	make $jobArgs
+}
+
+INSTALL()
+{
+	install -m 0755 -d "$docDir"
+	install -m 0644 -t "$docDir" README.md
+	install -m 0755 -d "$addOnsDir"/libretro
+	install -m 0644 -t "$addOnsDir"/libretro \
+		opera_libretro.info \
+		opera_libretro.so
+}