diff --git a/docs/gamemodes.md b/docs/gamemodes.md
index d3fd10e..70fbbf1 100644
--- a/docs/gamemodes.md
+++ b/docs/gamemodes.md
@@ -3,19 +3,11 @@ Game modes
 
 There are several classes of game modes. The modes that originate from other games are organized by suffix:
 
-* The "C" series stand for "Classic" games, games that were produced before around 1992-1993 and generally have no wallkicks or lock delay.
-	* C84 - The original version from the Electronika 60.
-	* C88 - Sega Tetris.
-	* C89 - Nintendo / NES Tetris.
 * The "A" series stand for "Arika" games, or games in the Tetris the Grand Master series.
 	* A1 - Tetris The Grand Master (the original from 1998).
 	* A2 - Tetris The Absolute The Grand Master 2 PLUS.
 	* A3 - Tetris The Grand Master 3 Terror-Instinct.
 	* AX - Tetris The Grand Master ACE (X for Xbox).
-* The "G" series stand for "Guideline" games, or games that follow the Tetris Guideline.
-	* GF - Tetris Friends (2007-2019)
-	* GJ - Tetris Online Japan (2005-2011)
-* N stands for Nullpomino, only used for Phantom Mania N.
 
 MARATHON
 --------
@@ -28,8 +20,6 @@ From other games:
 * **MARATHON A1**: Tetris the Grand Master 1.
 * **MARATHON A2**: Tetris the Grand Master 2 (TAP Master).
 * **MARATHON A3**: Tetris the Grand Master 3 (no exams).
-* **MARATHON AX4**: Another mode from TGM Ace.
-* **MARATHON C89**: Nintendo NES Tetris. Can you transition and make it to the killscreen?
 
 
 SURVIVAL
@@ -43,14 +33,7 @@ From other games:
 * **SURVIVAL A1**: 20G mode from Tetris the Grand Master.
 * **SURVIVAL A2**: T.A. Death.
 * **SURVIVAL A3**: Ti Shirase.
-
-
-RACE
-----
-
-Modes with no levels, just a single timed goal.
-
-* **Race 40**: How fast can you clear 40 lines? No limits, no holds barred.
+* **SURVIVAL AX**: Another mode from TGM Ace.
 
 
 PHANTOM MANIA
@@ -69,8 +52,4 @@ OTHER MODES
 
 * **Strategy**: How well can you plan ahead your movements? Can you handle only having a short time to place each piece?
 
-* **TetrisGram™ Pacer Test**: is a multi-stage piece-placing ability test that progressively gets more difficult as it continues.
-
-* **Interval Training**: 30 seconds per section. 20G. 15 frames of lock delay. How long can you last?
-
-* **Demon Mode**: An original mode from Oshisaure! Can you push through the ever faster levels and not get denied?
\ No newline at end of file
+* **Big A2**: Marathon A2 but all the pieces are BIG!
\ No newline at end of file
diff --git a/tetris/modes/marathon_ax4.lua b/tetris/modes/survival_ax.lua
similarity index 76%
rename from tetris/modes/marathon_ax4.lua
rename to tetris/modes/survival_ax.lua
index f4b628c..c8c3adc 100644
--- a/tetris/modes/marathon_ax4.lua
+++ b/tetris/modes/survival_ax.lua
@@ -5,15 +5,15 @@ local Piece = require 'tetris.components.piece'
 
 local Bag7NoSZOStartRandomizer = require 'tetris.randomizers.bag7noSZOstart'
 
-local MarathonAX4Game = GameMode:extend()
+local SurvivalAXGame = GameMode:extend()
 
-MarathonAX4Game.name = "Marathon AX4"
-MarathonAX4Game.hash = "MarathonAX4"
-MarathonAX4Game.tagline = "Can you clear the time hurdles when the game goes this fast?"
+SurvivalAXGame.name = "Survival AX"
+SurvivalAXGame.hash = "SurvivalAX"
+SurvivalAXGame.tagline = "Can you clear the time hurdles when the game goes this fast?"
 
 
-function MarathonAX4Game:new()
-	MarathonAX4Game.super:new()
+function SurvivalAXGame:new()
+	SurvivalAXGame.super:new()
 
 	self.roll_frames = 0
 	self.randomizer = Bag7NoSZOStartRandomizer()
@@ -29,7 +29,7 @@ function MarathonAX4Game:new()
 	self.next_queue_length = 3
 end
 
-function MarathonAX4Game:getARE()
+function SurvivalAXGame:getARE()
 		if self.lines < 10 then return 18
 	elseif self.lines < 40 then return 14
 	elseif self.lines < 60 then return 12
@@ -39,24 +39,24 @@ function MarathonAX4Game:getARE()
 	else return 6 end
 end
 
-function MarathonAX4Game:getLineARE()
+function SurvivalAXGame:getLineARE()
 	return self:getARE()
 end
 
-function MarathonAX4Game:getDasLimit()
+function SurvivalAXGame:getDasLimit()
 		if self.lines < 20 then return 10
 	elseif self.lines < 50 then return 9
 	elseif self.lines < 70 then return 8
 	else return 7 end
 end
 
-function MarathonAX4Game:getLineClearDelay()
+function SurvivalAXGame:getLineClearDelay()
 		if self.lines < 10 then return 14
 	elseif self.lines < 30 then return 9
 	else return 5 end
 end
 
-function MarathonAX4Game:getLockDelay()
+function SurvivalAXGame:getLockDelay()
 		if self.lines < 10 then return 28
 	elseif self.lines < 20 then return 24
 	elseif self.lines < 30 then return 22
@@ -66,15 +66,15 @@ function MarathonAX4Game:getLockDelay()
 	else return 13 end
 end
 
-function MarathonAX4Game:getGravity()
+function SurvivalAXGame:getGravity()
 	return 20
 end
 
-function MarathonAX4Game:getSection()
+function SurvivalAXGame:getSection()
 	return math.floor(level / 100) + 1
 end
 
-function MarathonAX4Game:advanceOneFrame()
+function SurvivalAXGame:advanceOneFrame()
 	if self.clear then
 		self.roll_frames = self.roll_frames + 1
 		if self.roll_frames < 0 then		
@@ -93,7 +93,7 @@ function MarathonAX4Game:advanceOneFrame()
 	return true
 end
 
-function MarathonAX4Game:onLineClear(cleared_row_count)
+function SurvivalAXGame:onLineClear(cleared_row_count)
 	if not self.clear then
 		local new_lines = self.lines + cleared_row_count
 		self:updateSectionTimes(self.lines, new_lines)
@@ -106,11 +106,11 @@ function MarathonAX4Game:onLineClear(cleared_row_count)
 	end
 end
 
-function MarathonAX4Game:getSectionTime()
+function SurvivalAXGame:getSectionTime()
 	return self.frames - self.section_start_time
 end
 
-function MarathonAX4Game:updateSectionTimes(old_lines, new_lines)
+function SurvivalAXGame:updateSectionTimes(old_lines, new_lines)
 	if math.floor(old_lines / 10) < math.floor(new_lines / 10) then
 		-- record new section
 		table.insert(self.section_times, self:getSectionTime())
@@ -119,23 +119,23 @@ function MarathonAX4Game:updateSectionTimes(old_lines, new_lines)
 	end
 end
 
-function MarathonAX4Game:onPieceEnter()
+function SurvivalAXGame:onPieceEnter()
 	self.section_clear = false
 end
 
-function MarathonAX4Game:drawGrid(ruleset)
+function SurvivalAXGame:drawGrid(ruleset)
 	self.grid:draw()
 end
 
-function MarathonAX4Game:getHighscoreData()
+function SurvivalAXGame:getHighscoreData()
 	return {
 		lines = self.lines,
 		frames = self.frames,
 	}
 end
 
-function MarathonAX4Game:drawScoringInfo()
-	MarathonAX4Game.super.drawScoringInfo(self)
+function SurvivalAXGame:drawScoringInfo()
+	SurvivalAXGame.super.drawScoringInfo(self)
 
 	love.graphics.setColor(1, 1, 1, 1)
 
@@ -165,12 +165,12 @@ function MarathonAX4Game:drawScoringInfo()
 	love.graphics.setColor(1, 1, 1, 1)
 end
 
-function MarathonAX4Game:getSectionEndLines()
+function SurvivalAXGame:getSectionEndLines()
 	return math.floor(self.lines / 10 + 1) * 10
 end
 
-function MarathonAX4Game:getBackground()
+function SurvivalAXGame:getBackground()
 	return math.floor(self.lines / 10)
 end
 
-return MarathonAX4Game
+return SurvivalAXGame
diff --git a/tetris/rulesets/arika.lua b/tetris/rulesets/arika.lua
index 5441eca..f5a5759 100644
--- a/tetris/rulesets/arika.lua
+++ b/tetris/rulesets/arika.lua
@@ -110,13 +110,7 @@ function ARS:onPieceDrop(piece, grid)
 	piece.lock_delay = 0 -- step reset
 end
 
-function ARS:get180RotationValue() 
-	if config.gamesettings.world_reverse == 3 then
-		return 1
-	else
-		return 3
-	end
-end
+function ARS:get180RotationValue() return 3 end
 
 function ARS:getDefaultOrientation() return 3 end  -- downward facing pieces by default
 
diff --git a/tetris/rulesets/arika_ace.lua b/tetris/rulesets/arika_ace.lua
index eb8b5d3..6b201be 100755
--- a/tetris/rulesets/arika_ace.lua
+++ b/tetris/rulesets/arika_ace.lua
@@ -49,4 +49,8 @@ function ARS:onPieceRotate(piece, grid)
 	end
 end
 
+function ARS:get180RotationValue() return 3 end
+
+function ARS:getDefaultOrientation() return 3 end  -- downward facing pieces by default
+
 return ARS
diff --git a/tetris/rulesets/arika_ace2.lua b/tetris/rulesets/arika_ace2.lua
index 6316237..525ee1b 100644
--- a/tetris/rulesets/arika_ace2.lua
+++ b/tetris/rulesets/arika_ace2.lua
@@ -36,4 +36,8 @@ function ARS:onPieceRotate(piece, grid)
 	end
 end
 
+function ARS:get180RotationValue() return 3 end
+
+function ARS:getDefaultOrientation() return 3 end  -- downward facing pieces by default
+
 return ARS
diff --git a/tetris/rulesets/arika_srs.lua b/tetris/rulesets/arika_srs.lua
index 82c89d6..88b9b6e 100755
--- a/tetris/rulesets/arika_srs.lua
+++ b/tetris/rulesets/arika_srs.lua
@@ -4,7 +4,19 @@ local Ruleset = require 'tetris.rulesets.ti_srs'
 local SRS = Ruleset:extend()
 
 SRS.name = "ACE-SRS"
-SRS.hash = "ACE Standard"
+SRS.hash = "StandardACE"
+SRS.world = true
+SRS.colourscheme = {
+	I = "C",
+	L = "O",
+	J = "B",
+	S = "G",
+	Z = "R",
+	O = "Y",
+	T = "M",
+}
+SRS.softdrop_lock = false
+SRS.harddrop_lock = true
 
 SRS.MANIPULATIONS_MAX = 128
 
diff --git a/tetris/rulesets/arika_ti.lua b/tetris/rulesets/arika_ti.lua
index 9121266..9210a55 100644
--- a/tetris/rulesets/arika_ti.lua
+++ b/tetris/rulesets/arika_ti.lua
@@ -99,4 +99,8 @@ function ARS:onPieceRotate(piece, grid)
 	end
 end
 
+function ARS:get180RotationValue() return 3 end
+
+function ARS:getDefaultOrientation() return 3 end  -- downward facing pieces by default
+
 return ARS
diff --git a/tetris/rulesets/cambridge.lua b/tetris/rulesets/cambridge.lua
index 54983eb..27e3739 100644
--- a/tetris/rulesets/cambridge.lua
+++ b/tetris/rulesets/cambridge.lua
@@ -364,9 +364,9 @@ function CRS:attemptRotate(new_inputs, piece, grid, initial)
 
 	if rot_dir == 0 then return end
 	
-	if self.world and config.gamesettings.world_reverse == 2 then
-		rot_dir = 4 - rot_dir
-	end
+    if config.gamesettings.world_reverse == 3 or (self.world and config.gamesettings.world_reverse == 2) then
+        rot_dir = 4 - rot_dir
+    end
 
 	local new_piece = piece:withRelativeRotation(rot_dir)
 	self:attemptWallkicks(piece, new_piece, rot_dir, grid)
diff --git a/tetris/rulesets/standard.lua b/tetris/rulesets/standard.lua
new file mode 100644
index 0000000..601f614
--- /dev/null
+++ b/tetris/rulesets/standard.lua
@@ -0,0 +1,206 @@
+local Piece = require 'tetris.components.piece'
+local Ruleset = require 'tetris.rulesets.ruleset'
+
+local SRS = Ruleset:extend()
+
+SRS.name = "Guideline SRS"
+SRS.hash = "Standard"
+SRS.world = true
+SRS.colourscheme = {
+	I = "C",
+	L = "O",
+	J = "B",
+	S = "G",
+	Z = "R",
+	O = "Y",
+	T = "M",
+}
+SRS.softdrop_lock = false
+SRS.harddrop_lock = true
+
+SRS.enable_IRS_wallkicks = true
+
+SRS.spawn_positions = {
+	I = { x=5, y=2 },
+	J = { x=4, y=3 },
+	L = { x=4, y=3 },
+	O = { x=5, y=3 },
+	S = { x=4, y=3 },
+	T = { x=4, y=3 },
+	Z = { x=4, y=3 },
+}
+
+SRS.big_spawn_positions = {
+	I = { x=3, y=0 },
+	J = { x=2, y=1 },
+	L = { x=2, y=1 },
+	O = { x=3, y=1 },
+	S = { x=2, y=1 },
+	T = { x=2, y=1 },
+	Z = { x=2, y=1 },
+}
+
+SRS.block_offsets = {
+	I={
+		{ {x=0, y=0}, {x=-1, y=0}, {x=-2, y=0}, {x=1, y=0} },
+		{ {x=0, y=0}, {x=0, y=-1}, {x=0, y=1}, {x=0, y=2} },
+		{ {x=0, y=1}, {x=-1, y=1}, {x=-2, y=1}, {x=1, y=1} },
+		{ {x=-1, y=0}, {x=-1, y=-1}, {x=-1, y=1}, {x=-1, y=2} },
+	},
+	J={
+		{ {x=0, y=0}, {x=-1, y=0}, {x=1, y=0}, {x=-1, y=-1} },
+		{ {x=0, y=0}, {x=0, y=-1}, {x=0, y=1} , {x=1, y=-1} },
+		{ {x=0, y=0}, {x=1, y=0}, {x=-1, y=0}, {x=1, y=1} },
+		{ {x=0, y=0}, {x=0, y=1}, {x=0, y=-1}, {x=-1, y=1} },
+	},
+	L={
+		{ {x=0, y=0}, {x=-1, y=0}, {x=1, y=0}, {x=1, y=-1} },
+		{ {x=0, y=0}, {x=0, y=-1}, {x=0, y=1}, {x=1, y=1} },
+		{ {x=0, y=0}, {x=1, y=0}, {x=-1, y=0}, {x=-1, y=1} },
+		{ {x=0, y=0}, {x=0, y=1}, {x=0, y=-1}, {x=-1, y=-1} },
+	},
+	O={
+		{ {x=0, y=0}, {x=-1, y=0}, {x=-1, y=-1}, {x=0, y=-1} },
+		{ {x=0, y=0}, {x=-1, y=0}, {x=-1, y=-1}, {x=0, y=-1} },
+		{ {x=0, y=0}, {x=-1, y=0}, {x=-1, y=-1}, {x=0, y=-1} },
+		{ {x=0, y=0}, {x=-1, y=0}, {x=-1, y=-1}, {x=0, y=-1} },
+	},
+	S={
+		{ {x=1, y=-1}, {x=0, y=-1}, {x=0, y=0}, {x=-1, y=0} },
+		{ {x=1, y=1}, {x=1, y=0}, {x=0, y=0}, {x=0, y=-1} },
+		{ {x=-1, y=1}, {x=0, y=1}, {x=0, y=0}, {x=1, y=0} },
+		{ {x=-1, y=-1}, {x=-1, y=0}, {x=0, y=0}, {x=0, y=1} },
+	},
+	T={
+		{ {x=0, y=0}, {x=-1, y=0}, {x=1, y=0}, {x=0, y=-1} },
+		{ {x=0, y=0}, {x=0, y=-1}, {x=0, y=1}, {x=1, y=0} },
+		{ {x=0, y=0}, {x=1, y=0}, {x=-1, y=0}, {x=0, y=1} },
+		{ {x=0, y=0}, {x=0, y=1}, {x=0, y=-1}, {x=-1, y=0} },
+	},
+	Z={
+		{ {x=-1, y=-1}, {x=0, y=-1}, {x=0, y=0}, {x=1, y=0} },
+		{ {x=1, y=-1}, {x=1, y=0}, {x=0, y=0}, {x=0, y=1} },
+		{ {x=1, y=1}, {x=0, y=1}, {x=0, y=0}, {x=-1, y=0} },
+		{ {x=-1, y=1}, {x=-1, y=0}, {x=0, y=0}, {x=0, y=-1} },
+	}
+}
+
+SRS.wallkicks_3x3 = {
+	[0]={
+		[1]={{x=-1, y=0}, {x=-1, y=-1}, {x=0, y=2}, {x=-1, y=2}},
+		[2]={{x=0, y=1}, {x=0, y=-1}},
+		[3]={{x=1, y=0}, {x=1, y=-1}, {x=0, y=2}, {x=1, y=2}},
+	},
+	[1]={
+		[0]={{x=1, y=0}, {x=1, y=1}, {x=0, y=-2}, {x=1, y=-2}},
+		[2]={{x=1, y=0}, {x=1, y=1}, {x=0, y=-2}, {x=1, y=-2}},
+		[3]={{x=0, y=1}, {x=0, y=-1}},
+	},
+	[2]={
+		[0]={{x=0, y=1}, {x=0, y=-1}},
+		[1]={{x=-1, y=0}, {x=-1, y=-1}, {x=0, y=2}, {x=-1, y=2}},
+		[3]={{x=1, y=0}, {x=1, y=-1}, {x=0, y=2}, {x=1, y=2}},
+	},
+	[3]={
+		[0]={{x=-1, y=0}, {x=-1, y=1}, {x=0, y=-2}, {x=-1, y=-2}},
+		[1]={{x=0, y=1}, {x=0, y=-1}},
+		[2]={{x=-1, y=0}, {x=-1, y=1}, {x=0, y=-2}, {x=-1, y=-2}},
+	},
+};
+
+SRS.wallkicks_line = {
+	[0]={
+		[1]={{x=-2, y=0}, {x=1, y=0}, {x=-2, y=1}, {x=1, y=-2}},
+		[2]={},
+		[3]={{x=-1, y=0}, {x=2, y=0}, {x=-1, y=-2}, {x=2, y=1}},
+	},
+	[1]={
+		[0]={{x=2, y=0}, {x=-1, y=0}, {x=2, y=-1}, {x=-1, y=2}},
+		[2]={{x=-1, y=0}, {x=2, y=0}, {x=-1, y=-2}, {x=2, y=1}},
+		[3]={{x=0, y=1}, {x=0, y=-1}, {x=0, y=2}, {x=0, y=-2}},
+	},
+	[2]={
+		[0]={},
+		[1]={{x=1, y=0}, {x=-2, y=0}, {x=1, y=2}, {x=-2, y=-1}},
+		[3]={{x=2, y=0}, {x=-1, y=0}, {x=2, y=-1}, {x=-1, y=2}},
+	},
+	[3]={
+		[0]={{x=1, y=0}, {x=-2, y=0}, {x=1, y=2}, {x=-2, y=-1}},
+		[1]={{x=0, y=1}, {x=0, y=-1}, {x=0, y=2}, {x=0, y=-2}},
+		[2]={{x=-2, y=0}, {x=1, y=0}, {x=-2, y=1}, {x=1, y=-2}},
+	},
+};
+
+function SRS:check_new_low(piece)
+	for _, block in pairs(piece:getBlockOffsets()) do
+		local y = piece.position.y + block.y
+		if y > piece.lowest_y then
+			piece.manipulations = 0
+			piece.lowest_y = y
+		end
+	end
+end
+
+-- Component functions.
+
+function SRS:attemptWallkicks(piece, new_piece, rot_dir, grid)
+
+	local kicks
+	if piece.shape == "O" then
+		return
+	elseif piece.shape == "I" then
+		kicks = SRS.wallkicks_line[piece.rotation][new_piece.rotation]
+	else
+		kicks = SRS.wallkicks_3x3[piece.rotation][new_piece.rotation]
+	end
+
+	assert(piece.rotation ~= new_piece.rotation)
+
+	for idx, offset in pairs(kicks) do
+		kicked_piece = new_piece:withOffset(offset)
+		if grid:canPlacePiece(kicked_piece) then
+			piece:setRelativeRotation(rot_dir)
+			piece:setOffset(offset)
+			self:onPieceRotate(piece, grid)
+			return
+		end
+	end
+
+end
+
+function SRS:onPieceCreate(piece, grid)
+	piece.manipulations = 0
+	piece.lowest_y = -math.huge
+end
+
+function SRS:onPieceDrop(piece, grid)
+	self:check_new_low(piece)
+	if piece.manipulations >= 15 and piece:isDropBlocked(grid) then
+		piece.locked = true
+	else
+		piece.lock_delay = 0 -- step reset
+	end
+end
+
+function SRS:onPieceMove(piece, grid)
+	piece.lock_delay = 0 -- move reset
+	if piece:isDropBlocked(grid) then
+		piece.manipulations = piece.manipulations + 1
+		if piece.manipulations >= 15 then
+			piece.locked = true
+		end
+	end
+end
+
+function SRS:onPieceRotate(piece, grid)
+	piece.lock_delay = 0 -- rotate reset
+	self:check_new_low(piece)
+	piece.manipulations = piece.manipulations + 1
+	if piece:isDropBlocked(grid) then
+		if piece.manipulations >= 15 then
+			piece.locked = true
+		end
+	end
+end
+
+return SRS
diff --git a/tetris/rulesets/standard_exp.lua b/tetris/rulesets/standard_exp.lua
index d285662..b73d56a 100755
--- a/tetris/rulesets/standard_exp.lua
+++ b/tetris/rulesets/standard_exp.lua
@@ -3,18 +3,32 @@ local Ruleset = require 'tetris.rulesets.arika_srs'
 
 local SRS = Ruleset:extend()
 
-SRS.name = "Guideline SRS"
-SRS.hash = "Standard"
+SRS.name = "SRS-X"
+SRS.hash = "StandardEXP"
+SRS.world = true
+SRS.colourscheme = {
+	I = "C",
+	L = "O",
+	J = "B",
+	S = "G",
+	Z = "R",
+	O = "Y",
+	T = "M",
+}
+SRS.softdrop_lock = false
+SRS.harddrop_lock = true
 
 SRS.enable_IRS_wallkicks = true
 
-SRS.MANIPULATIONS_MAX = 15
+SRS.MANIPULATIONS_MAX = 24
+SRS.ROTATIONS_MAX = 12
 
 function SRS:checkNewLow(piece)
 	for _, block in pairs(piece:getBlockOffsets()) do
 		local y = piece.position.y + block.y
 		if y > piece.lowest_y then
 			piece.manipulations = 0
+			piece.rotations = 0
 			piece.lowest_y = y
 		end
 	end
@@ -72,6 +86,7 @@ end
 
 function SRS:onPieceCreate(piece, grid)
 	piece.manipulations = 0
+	piece.rotations = 0
 	piece.lowest_y = -math.huge
 end
 
@@ -88,7 +103,7 @@ function SRS:onPieceMove(piece, grid)
 	piece.lock_delay = 0 -- move reset
 	if piece:isDropBlocked(grid) then
 		piece.manipulations = piece.manipulations + 1
-		if piece.manipulations >= self.MANIPULATIONS_MAX then
+		if piece.manipulations >= 24 then
 			piece.locked = true
 		end
 	end
@@ -97,8 +112,8 @@ end
 function SRS:onPieceRotate(piece, grid)
 	piece.lock_delay = 0 -- rotate reset
 	self:checkNewLow(piece)
-	piece.manipulations = piece.manipulations + 1
-    if piece.manipulations >= self.MANIPULATIONS_MAX then
+	piece.rotations = piece.rotations + 1
+    if piece.rotations >= self.ROTATIONS_MAX then
         piece:moveInGrid({ x = 0, y = 1 }, 1, grid)
         if piece:isDropBlocked(grid) then
             piece.locked = true
diff --git a/tetris/rulesets/ti_srs.lua b/tetris/rulesets/ti_srs.lua
index 8e38244..046d2bd 100644
--- a/tetris/rulesets/ti_srs.lua
+++ b/tetris/rulesets/ti_srs.lua
@@ -4,7 +4,7 @@ local Ruleset = require 'tetris.rulesets.ruleset'
 local SRS = Ruleset:extend()
 
 SRS.name = "Ti-World"
-SRS.hash = "Bad I-kicks"
+SRS.hash = "StandardTI"
 SRS.world = true
 SRS.colourscheme = {
 	I = "C",
@@ -192,12 +192,6 @@ function SRS:onPieceRotate(piece, grid)
 	end
 end
 
-function SRS:get180RotationValue() 
-	if config.gamesettings.world_reverse == 1 then
-		return 1
-	else
-		return 3
-	end
-end
+function SRS:get180RotationValue() return 3 end
 
 return SRS