diff --git a/kde-apps/step/additional-files/step.rdef.in b/kde-apps/step/additional-files/step.rdef.in
new file mode 100644
index 000000000..3d9d45787
--- /dev/null
+++ b/kde-apps/step/additional-files/step.rdef.in
@@ -0,0 +1,40 @@
+
+resource app_flags B_MULTIPLE_LAUNCH;
+
+resource app_version {
+	major  = @MAJOR@,
+	middle = @MIDDLE@,
+	minor  = @MINOR@,
+
+	variety = B_APPV_FINAL,
+	internal = 0,
+
+	short_info = "Step",
+	long_info = "@LONG_INFO@"
+};
+
+resource app_signature "@APP_SIGNATURE@";
+
+resource("QT:QPA_FLAGS") "Q_KILL_ON_EXIT";
+
+resource vector_icon {
+	$"6E6369660802000602403C9E00000000000040166CC40D6344F292947F4C00FF"
+	$"182400020006023EE1133AF919BA2CBF3E1B2C48A00048CEA48DFFAA00FF633B"
+	$"02050102001602B97441B80465394724BACE754B02D149E42A003EFFBD020116"
+	$"023C00000000000000003B400049A00049200000FFFF4D05A0015E3802840401"
+	$"6D130604BA22444C5D5B515B514F4A30390606AF092240224022C02A224422C0"
+	$"ED22444C5C5B514C4C570A0422404C575B4C30380405FE014B534B3E4B534BBC"
+	$"CA5036C4CCBCC25433553755B9FF554B4B080228304B3F0802322B5537020440"
+	$"30C34530BC3A30304030BC3A30C3454050BC3A50C34550504050C34550BC3A08"
+	$"022D33313908023637393C08023D3B403F0802463E5140080251404D36080240"
+	$"3E45330802393B3D3008023238362D08022C4246500802343C504A0A054C5E53"
+	$"5E605560505C4E0A062244224030385B4C5B524C5D100A070111000A02011210"
+	$"01178422040A00020001000A010102000A06020F101001178200040A02010312"
+	$"3FB6DB0000000000003F19F6CA1124C58ED401178420040A030103123FB6DB00"
+	$"00000000003F19F6CA1124C58ED401178122040A05080A0908070B0C0D0E1001"
+	$"178100040A020204051001178322040A040106023C00000000000000003C0000"
+	$"4680004880000A040106023C00000000000000003C000048200048E0000A0401"
+	$"06023C00000000000000003C00004900004940000A030204051001178122040A"
+	$"0201031001178420040A0301031001178122040A040106023C00000000000000"
+	$"003C00004AB000496000"
+};
diff --git a/kde-apps/step/patches/step-20.12.2.patchset b/kde-apps/step/patches/step-20.12.2.patchset
new file mode 100644
index 000000000..2147472af
--- /dev/null
+++ b/kde-apps/step/patches/step-20.12.2.patchset
@@ -0,0 +1,22 @@
+From 24d22bd4051a3db41dd73aff9131d9251d11ae79 Mon Sep 17 00:00:00 2001
+From: Gerasim Troeglazov <3dEyes@gmail.com>
+Date: Thu, 4 Mar 2021 23:27:22 +1000
+Subject: Fix install
+
+
+diff --git a/step/CMakeLists.txt b/step/CMakeLists.txt
+index a60df48..971685c 100644
+--- a/step/CMakeLists.txt
++++ b/step/CMakeLists.txt
+@@ -84,6 +84,8 @@ target_link_libraries(step
+     Qt5::Widgets
+     ${qalculate_LIBS})
+ 
++set(KDE_INSTALL_KNSRCDIR ${CMAKE_INSTALL_DATADIR}/knsrcfiles)
++
+ install(TARGETS step ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
+ install(FILES step.kcfg DESTINATION  ${KDE_INSTALL_KCFGDIR})
+ install(FILES stepui.rc DESTINATION  ${KDE_INSTALL_KXMLGUI5DIR}/step)
+-- 
+2.30.0
+
diff --git a/kde-apps/step/step-20.12.2.recipe b/kde-apps/step/step-20.12.2.recipe
new file mode 100644
index 000000000..c7a88f292
--- /dev/null
+++ b/kde-apps/step/step-20.12.2.recipe
@@ -0,0 +1,179 @@
+SUMMARY="Interactive physics simulator"
+DESCRIPTION="Step is an interactive physical simulator. It allows you to explore \
+the physical world through simulations. It works like this: you place some bodies \
+on the scene, add some forces such as gravity or springs, then click Simulate and \
+Step shows you how your scene will evolve according to the laws of physics. You \
+can change every property of the bodies/forces in your experiment (even during \
+simulation) and see how this will change evolution of the experiment. \
+With Step you cannot only learn but feel how physics works!
+
+Features:
+* Classical mechanical simulation in two dimensions
+* Particles, springs with damping, gravitational and coulomb forces
+* Rigid bodies
+* Collision detection (currently only discrete) and handling
+* Soft (deformable) bodies simulated as user-editable particles-springs system, sound waves
+* Molecular dynamics (currently using Lennard-Jones potential): gas and liquid, \
+condensation and evaporation, calculation of macroscopic quantities and their variances
+* Units conversion and expression calculation: you can enter something like \"(2 days + \
+3 hours) * 80 km/h\" and it will be accepted as distance value (requires libqalculate)
+* Errors calculation and propagation: you can enter values like \"1.3 ± 0.2\" for any property \
+and errors for all dependent properties will be calculated using statistical formulas
+* Solver error estimation: errors introduced by the solver is calculated and added \
+to user-entered errors
+* Several different solvers: up to 8th order, explicit and implicit, with or without \
+adaptive timestep (most of the solvers require GSL library)
+* Controller tool to easily control properties during simulation (even with \
+custom keyboard shortcuts)
+* Tools to visualize results: graph, meter, tracer
+* Context information for all objects, integrated wikipedia browser
+* Collection of example experiments, more can be downloaded with KNewStuff
+* Integrated tutorials."
+HOMEPAGE="https://apps.kde.org/ru/step"
+COPYRIGHT="2010-2021 KDE Organisation"
+LICENSE="GNU GPL v2"
+REVISION="1"
+SOURCE_URI="https://download.kde.org/stable/release-service/$portVersion/src/step-$portVersion.tar.xz"
+CHECKSUM_SHA256="670a501890baaf650506d88b61a9b08a5539aaa31200c6b27abad5984bda2db7"
+SOURCE_DIR="step-$portVersion"
+PATCHES="step-$portVersion.patchset"
+ADDITIONAL_FILES="step.rdef.in"
+
+ARCHITECTURES="!x86_gcc2 x86_64"
+SECONDARY_ARCHITECTURES="x86"
+
+PROVIDES="
+	step$secondaryArchSuffix = $portVersion
+	app:Step$secondaryArchSuffix = $portVersion
+	"
+REQUIRES="
+	haiku$secondaryArchSuffix
+	lib:libgsl$secondaryArchSuffix
+	lib:libKF5Archive$secondaryArchSuffix
+	lib:libKF5Attica$secondaryArchSuffix
+	lib:libKF5Auth$secondaryArchSuffix
+	lib:libKF5Bookmarks$secondaryArchSuffix
+	lib:libKF5Codecs$secondaryArchSuffix
+	lib:libKF5Completion$secondaryArchSuffix
+	lib:libKF5ConfigCore$secondaryArchSuffix
+	lib:libKF5ConfigGui$secondaryArchSuffix
+	lib:libKF5ConfigWidgets$secondaryArchSuffix
+	lib:libKF5CoreAddons$secondaryArchSuffix
+	lib:libKF5Crash$secondaryArchSuffix
+	lib:libKF5DBusAddons$secondaryArchSuffix
+	lib:libKF5GuiAddons$secondaryArchSuffix
+	lib:libKF5I18n$secondaryArchSuffix
+	lib:libKF5IconThemes$secondaryArchSuffix
+	lib:libKF5ItemViews$secondaryArchSuffix
+	lib:libKF5JobWidgets$secondaryArchSuffix
+	lib:libKF5KIOCore$secondaryArchSuffix
+	lib:libKF5KIOFileWidgets$secondaryArchSuffix
+	lib:libKF5KIOWidgets$secondaryArchSuffix
+	lib:libKF5NewStuff$secondaryArchSuffix
+	lib:libKF5Notifications$secondaryArchSuffix
+	lib:libKF5Plotting$secondaryArchSuffix
+	lib:libKF5Service$secondaryArchSuffix
+	lib:libKF5Solid$secondaryArchSuffix
+	lib:libKF5SonnetUi$secondaryArchSuffix
+	lib:libKF5TextEditor$secondaryArchSuffix
+	lib:libKF5TextWidgets$secondaryArchSuffix
+	lib:libKF5WidgetsAddons$secondaryArchSuffix
+	lib:libKF5WindowSystem$secondaryArchSuffix
+	lib:libKF5XmlGui$secondaryArchSuffix
+	lib:libQt5Core$secondaryArchSuffix
+	lib:libQt5DBus$secondaryArchSuffix
+	lib:libQt5Gui$secondaryArchSuffix
+	lib:libQt5Widgets$secondaryArchSuffix
+	lib:libQt5Xml$secondaryArchSuffix
+	"
+
+BUILD_REQUIRES="
+	haiku${secondaryArchSuffix}_devel
+	extra_cmake_modules$secondaryArchSuffix >= 5.77
+	devel:eigen$secondaryArchSuffix
+	devel:libgsl$secondaryArchSuffix
+	devel:libKF5Archive$secondaryArchSuffix
+	devel:libKF5Attica$secondaryArchSuffix
+	devel:libKF5Auth$secondaryArchSuffix
+	devel:libKF5Bookmarks$secondaryArchSuffix
+	devel:libKF5Codecs$secondaryArchSuffix
+	devel:libKF5Completion$secondaryArchSuffix
+	devel:libKF5ConfigCore$secondaryArchSuffix
+	devel:libKF5ConfigWidgets$secondaryArchSuffix
+	devel:libKF5CoreAddons$secondaryArchSuffix
+	devel:libKF5Crash$secondaryArchSuffix
+	devel:libKF5DBusAddons$secondaryArchSuffix
+	devel:libKF5DocTools$secondaryArchSuffix
+	devel:libKF5GuiAddons$secondaryArchSuffix
+	devel:libKF5I18n$secondaryArchSuffix
+	devel:libKF5IconThemes$secondaryArchSuffix
+	devel:libKF5ItemModels$secondaryArchSuffix
+	devel:libKF5ItemViews$secondaryArchSuffix
+	devel:libKF5JobWidgets$secondaryArchSuffix
+	devel:libKF5KIOCore$secondaryArchSuffix
+	devel:libKF5KIOFileWidgets$secondaryArchSuffix
+	devel:libKF5KIOWidgets$secondaryArchSuffix
+	devel:libKF5NewStuff$secondaryArchSuffix
+	devel:libKF5Notifications$secondaryArchSuffix
+	devel:libKF5Plotting$secondaryArchSuffix 
+	devel:libKF5Service$secondaryArchSuffix
+	devel:libKF5Solid$secondaryArchSuffix
+	devel:libKF5SonnetUi$secondaryArchSuffix
+	devel:libKF5TextEditor$secondaryArchSuffix
+	devel:libKF5TextWidgets$secondaryArchSuffix
+	devel:libKF5WidgetsAddons$secondaryArchSuffix
+	devel:libKF5WindowSystem$secondaryArchSuffix
+	devel:libKF5XmlGui$secondaryArchSuffix
+	devel:libQt5Core$secondaryArchSuffix >= 5.15
+	"
+BUILD_PREREQUIRES="
+	cmd:cmake
+	cmd:g++$secondaryArchSuffix
+	cmd:lrelease$secondaryArchSuffix >= 5
+	cmd:make
+	cmd:pkg_config$secondaryArchSuffix
+	cmd:update_mime_database$secondaryArchSuffix
+	"
+
+BUILD()
+{
+	# disable docs generation
+	sed -e '/add_subdirectory(doc)/ s/^#*/#/' -i CMakeLists.txt
+	sed -e '/kdoctools_install(po)/ s/^#*/#/' -i CMakeLists.txt
+
+	mkdir -p build
+	cd build
+
+	cmake .. \
+		-DCMAKE_INSTALL_PREFIX=$appsDir \
+		-DCMAKE_INSTALL_DATADIR=$dataDir \
+		-DCMAKE_INSTALL_DATAROOTDIR=$dataDir \
+		-DSHARE_INSTALL_PREFIX=$dataDir \
+		-DECM_DIR=/system/data/cmake/Modules/ECM/cmake
+	make $jobArgs
+}
+
+INSTALL()
+{
+	cd build
+	make install
+
+	mv $appsDir/bin/step $appsDir/Step
+	rm -rf $appsDir/bin $dataDir/icons
+
+	local APP_SIGNATURE="application/x-vnd.kde-step"
+	local MAJOR="`echo "$portVersion" | cut -d. -f1`"
+	local MIDDLE="`echo "$portVersion" | cut -d. -f2`"
+	local MINOR="`echo "$portVersion" | cut -d. -f3`"
+	local LONG_INFO="$SUMMARY"
+	sed \
+		-e "s|@APP_SIGNATURE@|$APP_SIGNATURE|" \
+		-e "s|@MAJOR@|$MAJOR|" \
+		-e "s|@MIDDLE@|$MIDDLE|" \
+		-e "s|@MINOR@|$MINOR|" \
+		-e "s|@LONG_INFO@|$LONG_INFO|" \
+		$portDir/additional-files/step.rdef.in > step.rdef
+
+	addResourcesToBinaries step.rdef $appsDir/Step
+	addAppDeskbarSymlink $appsDir/Step
+}