diff --git a/tetris/rulesets/srs_x.lua b/tetris/rulesets/srs_x.lua
new file mode 100644
index 0000000..d2f0c37
--- /dev/null
+++ b/tetris/rulesets/srs_x.lua
@@ -0,0 +1,177 @@
+local Piece = require 'tetris.components.piece'
+local Ruleset = require 'tetris.rulesets.ruleset'
+
+local SRS = Ruleset:extend()
+
+SRS.name = "SRS-X"
+SRS.hash = "Reversed SRS drop functions"
+SRS.world = true
+
+SRS.spawn_positions = {
+	I = { x=5, y=4 },
+	J = { x=4, y=5 },
+	L = { x=4, y=5 },
+	O = { x=5, y=5 },
+	S = { x=4, y=5 },
+	T = { x=4, y=5 },
+	Z = { x=4, y=5 },
+}
+
+SRS.big_spawn_positions = {
+	I = { x=3, y=2 },
+	J = { x=2, y=3 },
+	L = { x=2, y=3 },
+	O = { x=3, y=3 },
+	S = { x=2, y=3 },
+	T = { x=2, y=3 },
+	Z = { x=2, y=3 },
+}
+
+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= 1, y=-2}, {x=-2, y= 1}},
+		[2]={},
+		[3]={{x= 2, y= 0}, {x=-1, 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]={},
+	},
+	[2]={
+		[0]={},
+		[1]={{x=-2, y= 0}, {x= 1, y= 0}, {x=-2, y=-1}, {x= 1, y= 1}},
+		[3]={{x= 2, y= 0}, {x=-1, y= 0}, {x= 2, y=-1}, {x=-1, y= 1}},
+	},
+	[3]={
+		[0]={{x=-2, y= 0}, {x= 1, y= 0}, {x=-2, y=-1}, {x= 1, y= 2}},
+		[1]={},
+		[2]={{x= 1, y= 0}, {x=-2, y= 0}, {x= 1, y=-2}, {x=-2, y= 1}},
+	},
+};
+
+-- 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.rotations = 0
+end
+
+function SRS:onPieceDrop(piece, grid)
+	piece.lock_delay = 0 -- step reset
+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 >= 24 then
+			piece.locked = true
+		end
+	end
+end
+
+function SRS:onPieceRotate(piece, grid)
+	piece.lock_delay = 0 -- rotate reset
+	if piece:isDropBlocked(grid) then
+		piece.rotations = piece.rotations + 1
+		if piece.rotations >= 12 then
+			piece.locked = true
+		end
+	end
+end
+
+return SRS