diff --git a/games-engines/frotz/frotz-2.50.recipe b/games-engines/frotz/frotz-2.50.recipe
new file mode 100644
index 000000000..0b5cc4b93
--- /dev/null
+++ b/games-engines/frotz/frotz-2.50.recipe
@@ -0,0 +1,55 @@
+SUMMARY="A Portable Z-Machine Interpreter"
+DESCRIPTION="Frotz is an interpreter for Infocom games \
+and other Z-machine games. \
+It complies with standard 1.0 of Graham Nelson's specification. \
+It was written by Stefan Jokisch in 1995-1997"
+HOMEPAGE="https://davidgriffith.gitlab.io/frotz/"
+COPYRIGHT="1995-1997 Stefan Jokish
+		1997-2019 David Griffith"
+LICENSE="GNU GPL v2"
+REVISION="1"
+SOURCE_URI="https://gitlab.com/DavidGriffith/frotz/-/archive/$portVersion/frotz-$portVersion.tar.bz2"
+CHECKSUM_SHA256="7fd1185318dec2c897228d6ed81d4d2599d64d1e5bb7f913c09d17f3337ec663"
+PATCHES="frotz-$portVersion.patchset"
+
+ARCHITECTURES="!x86_gcc2 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	frotz$secondaryArchSuffix = $portVersion
+	cmd:frotz
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libao$secondaryArchSuffix
+	lib:libmodplug$secondaryArchSuffix
+	lib:libncurses$secondaryArchSuffix
+	lib:libsamplerate$secondaryArchSuffix
+	lib:libsndfile$secondaryArchSuffix
+	lib:libvorbis$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	devel:libao$secondaryArchSuffix
+	devel:libmodplug$secondaryArchSuffix
+	devel:libncurses$secondaryArchSuffix
+	devel:libsamplerate$secondaryArchSuffix
+	devel:libsndfile$secondaryArchSuffix
+	devel:libvorbis$secondaryArchSuffix
+	"
+BUILD_PREREQUIRES="
+	cmd:gcc$secondaryArchSuffix
+	cmd:make
+	cmd:which
+	"
+
+BUILD()
+{
+	make $jobArgs
+}
+
+INSTALL()
+{
+	make PREFIX=$prefix MANDIR=$manDir install
+}
diff --git a/games-engines/frotz/patches/frotz-2.50.patchset b/games-engines/frotz/patches/frotz-2.50.patchset
new file mode 100644
index 000000000..6f17b0924
--- /dev/null
+++ b/games-engines/frotz/patches/frotz-2.50.patchset
@@ -0,0 +1,154 @@
+From c77da0a4204db0029f4c0a4a35a108b79d3af605 Mon Sep 17 00:00:00 2001
+From: Vrondir <nikiporumbachanov@gmail.com>
+Date: Thu, 12 Dec 2019 17:03:37 +0000
+Subject: Remove -pthread flag
+
+
+diff --git a/src/curses/Makefile b/src/curses/Makefile
+index 9f5ea43..8c9fe58 100644
+--- a/src/curses/Makefile
++++ b/src/curses/Makefile
+@@ -15,7 +15,7 @@ ARFLAGS = rc
+ SOUND_TYPE ?= ao
+ 
+ ifeq ($(SOUND_TYPE), ao)
+-  CFLAGS += -pthread
++#  CFLAGS += -pthread
+ else ifeq ($(SOUND_TYPE), none)
+ 
+ else ifndef SOUND_TYPE
+-- 
+2.23.0
+
+
+From fb283598814089fb7aae98fe7a0195a5a3f665fd Mon Sep 17 00:00:00 2001
+From: Vrondir <nikiporumbachanov@gmail.com>
+Date: Fri, 13 Dec 2019 21:06:32 +0000
+Subject: Remove trailing whitespace
+
+
+diff --git a/Makefile b/Makefile
+index 2aba2e9..9938fc6 100644
+--- a/Makefile
++++ b/Makefile
+@@ -91,30 +91,30 @@ STACK_SIZE = 1024
+ 
+ # Determine if we are compiling on MAC OS X
+ ifneq ($(OS),Windows_NT)
+-    # For now, assume !windows == unix.
+-    OS_TYPE ?= unix
+-    UNAME_S := $(shell uname -s)
+-    ifeq ($(UNAME_S),Darwin)
++	# For now, assume !windows == unix.
++	OS_TYPE ?= unix
++	UNAME_S := $(shell uname -s)
++	ifeq ($(UNAME_S),Darwin)
+ 	MACOS = yes
+ 	# On MACOS, curses is actually ncurses, but to get wide char support
+ 	# you need to define _XOPEN_SOURCE_EXTENDED
+ 	CURSES = curses
+ 	CFLAGS += -D_XOPEN_SOURCE_EXTENDED -DMACOS -I/opt/local/include
+ 	LDFLAGS += -L/opt/local/lib
+-    endif
+-    ifeq ($(UNAME_S),NetBSD)
++	endif
++	ifeq ($(UNAME_S),NetBSD)
+ 	NETBSD = yes
+ 	CFLAGS += -D_NETBSD_SOURCE -I/usr/pkg/include
+ 	LDFLAGS += -Wl,-R/usr/pkg/lib -L/usr/pkg/lib
+ 	SDL_LDFLAGS += -lexecinfo
+-    endif
+-    ifeq ($(UNAME_S),FreeBSD)
++	endif
++	ifeq ($(UNAME_S),FreeBSD)
+ 	FREEBSD = yes
+ 	CFLAGS += -I/usr/local/include
+ 	LDFLAGS += -L/usr/local/lib
+ 	SDL_LDFLAGS += -lexecinfo
+-    endif
+-    ifeq ($(UNAME_S),OpenBSD)
++	endif
++	ifeq ($(UNAME_S),OpenBSD)
+ 	OPENBSD = yes
+ 	NO_EXECINFO_H = yes
+ 	NO_UCONTEXT_H = yes
+@@ -123,11 +123,11 @@ ifneq ($(OS),Windows_NT)
+ 	LDFLAGS += -L/usr/local/lib
+ 	SDL_CFLAGS += -DSDL_DISABLE_IMMINTRIN_H
+ 	SDL_LDFLAGS += -lexecinfo
+-    endif
+-    ifeq ($(UNAME_S),Linux)
++	endif
++	ifeq ($(UNAME_S),Linux)
+ 	CFLAGS += -D_POSIX_C_SOURCE=200809L
+ 	NPROCS = $(shell grep -c ^processor /proc/cpuinfo)
+-    endif
++	endif
+ endif
+ 
+ RANLIB ?= $(shell which ranlib)
+@@ -174,15 +174,15 @@ export CFLAGS
+ #
+ CURSES_LDFLAGS += -l$(CURSES)
+ ifeq ($(CURSES), curses)
+-  CURSES_DEFINE = USE_CURSES_H
++	CURSES_DEFINE = USE_CURSES_H
+ else ifneq ($(findstring ncurses,$(CURSES)),)
+-  CURSES_CFLAGS += -D_XOPEN_SOURCE_EXTENDED
+-  CURSES_DEFINE = USE_NCURSES_H
++	CURSES_CFLAGS += -D_XOPEN_SOURCE_EXTENDED
++	CURSES_DEFINE = USE_NCURSES_H
+ ifdef NETBSD
+ ifeq ($(CURSES), ncursesw)
+-  CURSES_CFLAGS += -I/usr/pkg/include/ncursesw
++	CURSES_CFLAGS += -I/usr/pkg/include/ncursesw
+ else
+-  CURSES_CFLAGS += -I/usr/pkg/include/ncurses
++	CURSES_CFLAGS += -I/usr/pkg/include/ncurses
+ endif
+ endif
+ endif
+@@ -227,21 +227,21 @@ SFROTZ_LIBS = $(COMMON_LIB) $(SDL_LIB) $(BLORB_LIB) $(COMMON_LIB)
+ 
+ 
+ ifdef NO_BLORB
+-  SOUND_TYPE = none
+-  CURSES_SOUND = disabled
+-  BLORB_SUPPORT = disabled
+-  FROTZ_LIBS  = $(COMMON_LIB) $(CURSES_LIB) $(COMMON_LIB)
+-  DFROTZ_LIBS = $(COMMON_LIB) $(DUMB_LIB) $(COMMON_LIB)
++	SOUND_TYPE = none
++	CURSES_SOUND = disabled
++	BLORB_SUPPORT = disabled
++	FROTZ_LIBS  = $(COMMON_LIB) $(CURSES_LIB) $(COMMON_LIB)
++	DFROTZ_LIBS = $(COMMON_LIB) $(DUMB_LIB) $(COMMON_LIB)
+ else
+-  BLORB_SUPPORT = enabled
++	BLORB_SUPPORT = enabled
+ endif
+ 
+ ifeq ($(SOUND_TYPE), ao)
+-  CURSES_SOUND_LDFLAGS += -lao -lpthread -lm \
+-	-lsndfile -lvorbisfile -lmodplug -lsamplerate
+-  CURSES_SOUND = enabled
++	CURSES_SOUND_LDFLAGS += -lao -lpthread -lm \
++		-lsndfile -lvorbisfile -lmodplug -lsamplerate
++	CURSES_SOUND = enabled
+ else
+-  CURSES_SOUND = disabled
++	CURSES_SOUND = disabled
+ endif
+ 
+ # Check to see if the -Orecurse option is available.  It's nice for
+@@ -297,7 +297,7 @@ ifneq ($(and $(wildcard $(GIT_DIR)),$(shell which git)),)
+ 		$(NAME)src/doc/*.6 $(NAME)src/doc/frotz.conf* \
+ 		$(NAME)src/doc/Xresources  > /dev/null
+ else
+-        @echo "Not in a git repository or git command not found.  Cannot make a tarball."
++		@echo "Not in a git repository or git command not found.  Cannot make a tarball."
+ endif
+ 
+ all: $(FROTZ_BIN) $(DFROTZ_BIN) $(SFROTZ_BIN)
+-- 
+2.23.0
+