diff --git a/load/graphics.lua b/load/graphics.lua
index e351b17..df76987 100644
--- a/load/graphics.lua
+++ b/load/graphics.lua
@@ -118,7 +118,8 @@ misc_graphics = {
 	ready = love.graphics.newImage("res/img/ready.png"),
 	go = love.graphics.newImage("res/img/go.png"),
 	select_mode = love.graphics.newImage("res/img/select_mode.png"),
+	select_challenge = love.graphics.newImage("res/img/select_challenge_placeholder.png"),
 	strike = love.graphics.newImage("res/img/strike.png"),
 	santa = love.graphics.newImage("res/img/santa.png"),
 	icon = love.graphics.newImage("res/img/cambridge_transparent.png")
-}
\ No newline at end of file
+}
diff --git a/main.lua b/main.lua
index f54b3c1..57ae2dd 100644
--- a/main.lua
+++ b/main.lua
@@ -13,14 +13,14 @@ function love.load()
 	loadSave()
 	require "funcs"
 	require "scene"
-	
+
 	--config["side_next"] = false
 	--config["reverse_rotate"] = true
 	--config["das_last_key"] = false
 	--config["fullscreen"] = false
 
 	love.window.setMode(love.graphics.getWidth(), love.graphics.getHeight(), {resizable = true});
-		
+
 	-- used for screenshots
 	GLOBAL_CANVAS = love.graphics.newCanvas()
 
@@ -42,6 +42,13 @@ function initModules()
 			game_modes[#game_modes+1] = require ("tetris.modes."..string.sub(mode_list[i],1,-5))
 		end
 	end
+	challenges = {}
+	challenge_list = love.filesystem.getDirectoryItems("tetris/challenges")
+	for i=1,#challenge_list do
+		if(challenge_list[i] ~= "challenge.lua" and string.sub(challenge_list[i], -4) == ".lua") then
+			challenges[#challenges+1] = require ("tetris.challenges."..string.sub(challenge_list[i],1,-5))
+		end
+	end
 	rulesets = {}
 	rule_list = love.filesystem.getDirectoryItems("tetris/rulesets")
 	for i=1,#rule_list do
@@ -72,7 +79,7 @@ function love.draw()
 		(height - scale_factor * 480) / 2
 	)
 	love.graphics.scale(scale_factor)
-		
+
 	scene:render()
 
 	if config.gamesettings.display_gamemode == 1 or scene.title == "Title" then
@@ -83,9 +90,9 @@ function love.draw()
 			"fps - " .. version, 0, 460, 635, "right"
 		)
 	end
-	
+
 	love.graphics.pop()
-		
+
 	love.graphics.setCanvas()
 	love.graphics.setColor(1,1,1,1)
 	love.graphics.draw(GLOBAL_CANVAS)
@@ -120,7 +127,7 @@ function love.keypressed(key, scancode)
 		GLOBAL_CANVAS:newImageData():encode("png", ss_name)
 	-- function keys are reserved
 	elseif string.match(scancode, "^f[1-9]$") or string.match(scancode, "^f[1-9][0-9]+$") then
-		return	
+		return
 	-- escape is reserved for menu_back
 	elseif scancode == "escape" then
 		scene:onInputPress({input="menu_back", type="key", key=key, scancode=scancode})
@@ -140,7 +147,7 @@ function love.keyreleased(key, scancode)
 		scene:onInputRelease({input="menu_back", type="key", key=key, scancode=scancode})
 	-- function keys are reserved
 	elseif string.match(scancode, "^f[1-9]$") or string.match(scancode, "^f[1-9][0-9]+$") then
-		return	
+		return
 	-- handle all other keys; tab is reserved, but the input config scene keeps it from getting configured as a game input, so pass tab to the scene here
 	else
 		local input_released = nil
@@ -186,7 +193,7 @@ function love.joystickaxis(joystick, axis, value)
 		config.input.joysticks and
 		config.input.joysticks[joystick:getName()] and
 		config.input.joysticks[joystick:getName()].axes and
-		config.input.joysticks[joystick:getName()].axes[axis] 
+		config.input.joysticks[joystick:getName()].axes[axis]
 	then
 		if math.abs(value) >= 1 then
 			input_pressed = config.input.joysticks[joystick:getName()].axes[axis][value >= 1 and "positive" or "negative"]
@@ -314,10 +321,10 @@ function love.run()
 		if love.timer then
 			processBGMFadeout(love.timer.step())
 		end
-		
+
 		if scene and scene.update and love.timer then
 			scene:update()
-			
+
 			local frame_duration = 1.0 / TARGET_FPS
 			if time_accumulator < frame_duration then
 				if love.graphics and love.graphics.isActive() and love.draw then
diff --git a/res/img/select_challenge_placeholder.png b/res/img/select_challenge_placeholder.png
new file mode 100644
index 0000000..644d6fb
Binary files /dev/null and b/res/img/select_challenge_placeholder.png differ
diff --git a/scene.lua b/scene.lua
index aaa81b8..30246eb 100644
--- a/scene.lua
+++ b/scene.lua
@@ -10,7 +10,9 @@ function Scene:onInputRelease() end
 
 ExitScene = require "scene.exit"
 GameScene = require "scene.game"
+ChallengeScene = require "scene.challenge"
 ModeSelectScene = require "scene.mode_select"
+ChallengeSelectScene = require "scene.challenge_select"
 KeyConfigScene = require "scene.key_config"
 StickConfigScene = require "scene.stick_config"
 InputConfigScene = require "scene.input_config"
diff --git a/scene/challenge.lua b/scene/challenge.lua
new file mode 100644
index 0000000..5fadce7
--- /dev/null
+++ b/scene/challenge.lua
@@ -0,0 +1,93 @@
+local ChallengeScene = Scene:extend()
+
+ChallengeScene.title = "Challenge"
+
+require 'load.save'
+
+function ChallengeScene:new(game_mode, ruleset, inputs)
+	self.retry_mode = game_mode
+	self.retry_ruleset = ruleset
+	self.secret_inputs = inputs
+	self.game = game_mode(self.secret_inputs)
+	self.ruleset = ruleset(self.game)
+	self.game:initialize(self.ruleset)
+	self.inputs = {
+		left=false,
+		right=false,
+		up=false,
+		down=false,
+		rotate_left=false,
+		rotate_left2=false,
+		rotate_right=false,
+		rotate_right2=false,
+		rotate_180=false,
+		hold=false,
+	}
+	self.paused = false
+	DiscordRPC:update({
+		details = "In challenge",
+		state = self.game.name,
+		largeImageKey = "ingame-"..self.game:getBackground().."00"
+	})
+end
+
+function ChallengeScene:update()
+	if love.window.hasFocus() and not self.paused then
+		local inputs = {}
+		for input, value in pairs(self.inputs) do
+			inputs[input] = value
+		end
+		self.game:update(inputs, self.ruleset)
+		self.game.grid:update()
+		DiscordRPC:update({
+			largeImageKey = "ingame-"..self.game:getBackground().."00"
+		})
+	end
+end
+
+function ChallengeScene:render()
+	self.game:draw(self.paused)
+end
+
+function ChallengeScene:onInputPress(e)
+	if (
+		self.game.game_over or self.game.completed
+	) and (
+		e.input == "menu_decide" or
+		e.input == "menu_back" or
+		e.input == "retry"
+	) then
+		highscore_entry = self.game:getHighscoreData()
+		highscore_hash = self.game.hash .. "-" .. self.ruleset.hash
+		submitHighscore(highscore_hash, highscore_entry)
+		self.game:onExit()
+		scene = e.input == "retry" and ChallengeScene(self.retry_mode, self.retry_ruleset, self.secret_inputs) or ModeSelectScene()
+	elseif e.input == "retry" then
+		switchBGM(nil)
+		self.game:onExit()
+		scene = ChallengeScene(self.retry_mode, self.retry_ruleset, self.secret_inputs)
+	elseif e.input == "pause" and not (self.game.game_over or self.game.completed) then
+		self.paused = not self.paused
+		if self.paused then pauseBGM()
+		else resumeBGM() end
+	elseif e.input == "menu_back" then
+		self.game:onExit()
+		scene = ChallengeSelectScene()
+	elseif e.input and string.sub(e.input, 1, 5) ~= "menu_" then
+		self.inputs[e.input] = true
+	end
+end
+
+function ChallengeScene:onInputRelease(e)
+	if e.input and string.sub(e.input, 1, 5) ~= "menu_" then
+		self.inputs[e.input] = false
+	end
+end
+
+function submitHighscore(hash, data)
+	if not highscores[hash] then highscores[hash] = {} end
+	table.insert(highscores[hash], data)
+	saveHighscores()
+end
+
+return ChallengeScene
diff --git a/scene/challenge_select.lua b/scene/challenge_select.lua
new file mode 100644
index 0000000..94c86b3
--- /dev/null
+++ b/scene/challenge_select.lua
@@ -0,0 +1,182 @@
+local ChallengeSelectScene = Scene:extend()
+
+ChallengeSelectScene.title = "Challenges"
+
+current_challenge = 1
+
+function indexOf(array, value)
+    for i, v in ipairs(array) do
+        if v == value then
+            return i
+        end
+    end
+    return nil
+end
+
+function ChallengeSelectScene:new()
+	-- reload custom modules
+	initModules()
+	if table.getn(challenges) == 0 then
+		self.display_warning = true
+		current_challenge = 1
+	else
+		self.display_warning = false
+		if current_challenge > table.getn(challenges) then
+			current_challenge = 1
+		end
+	end
+
+	self.menu_state = {
+		challenge = current_challenge,
+		select = "challenge",
+	}
+	self.secret_inputs = {}
+	self.das = 0
+	DiscordRPC:update({
+		details = "In menus",
+		state = "Choosing a challenge",
+		largeImageKey = "ingame-000"
+	})
+end
+
+function ChallengeSelectScene:update()
+	switchBGM(nil) -- experimental
+
+	if self.das_up or self.das_down then
+		self.das = self.das + 1
+	else
+		self.das = 0
+	end
+
+	if self.das >= 15 then
+		self:changeOption(self.das_up and -1 or 1)
+		self.das = self.das - 4
+	end
+
+	DiscordRPC:update({
+		details = "In menus",
+		state = "Choosing a challenge",
+		largeImageKey = "ingame-000"
+	})
+end
+
+function ChallengeSelectScene:render()
+	love.graphics.draw(
+		backgrounds[0],
+		0, 0, 0,
+		0.5, 0.5
+	)
+
+	love.graphics.draw(misc_graphics["select_challenge"], 20, 40)
+
+	if self.display_warning then
+		love.graphics.setFont(font_3x5_3)
+		love.graphics.printf(
+			"You have no challenges",
+			80, 200, 480, "center"
+		)
+		love.graphics.setFont(font_3x5_2)
+		love.graphics.printf(
+			"Come back to this menu after getting more challenges. " ..
+			"Press any button to return to the main menu.",
+			80, 250, 480, "center"
+		)
+		return
+	end
+
+	if self.menu_state.select == "challenge" then
+		love.graphics.setColor(1, 1, 1, 0.5)
+	end
+	love.graphics.rectangle("fill", 20, 258, 240, 22)
+
+	if self.menu_state.select == "challenge" then
+		love.graphics.setColor(1, 1, 1, 0.25)
+	end
+
+	love.graphics.setColor(1, 1, 1, 1)
+
+	love.graphics.setFont(font_3x5_2)
+	for idx, challenge in pairs(challenges) do
+		if(idx >= self.menu_state.challenge-9 and idx <= self.menu_state.challenge+9) then
+			love.graphics.printf(challenge.name, 40, (260 - 20*(self.menu_state.challenge)) + 20 * idx, 200, "left")
+			cur_tagline = challenge.tagline
+		end
+	end
+
+
+
+end
+
+function ChallengeSelectScene:onInputPress(e)
+	if self.display_warning and e.input then
+		scene = TitleScene()
+	elseif e.type == "wheel" then
+		if e.x % 2 == 1 then
+			self:switchSelect()
+		end
+		if e.y ~= 0 then
+			self:changeOption(-e.y)
+		end
+	elseif e.input == "menu_decide" or e.scancode == "return" then
+		for idx, mode in pairs(game_modes) do
+			if mode.hash == challenges[self.menu_state.challenge].mode then
+				cur_mode = idx
+				break
+			end
+		end
+		for idx, ruleset in pairs(rulesets) do
+			if ruleset.hash == challenges[self.menu_state.challenge].ruleset then
+				cur_ruleset = idx
+				break
+			end
+		end
+		playSE("mode_decide")
+		saveConfig()
+		scene = ChallengeScene(
+			challenges[current_challenge],
+			rulesets[cur_ruleset]
+		)
+	elseif e.input == "up" or e.scancode == "up" then
+		self:changeOption(-1)
+		self.das_up = true
+		self.das_down = nil
+	elseif e.input == "down" or e.scancode == "down" then
+		self:changeOption(1)
+		self.das_down = true
+		self.das_up = nil
+	elseif e.input == "menu_back" or e.scancode == "delete" or e.scancode == "backspace" then
+		scene = TitleScene()
+	elseif e.input then
+		self.secret_inputs[e.input] = true
+	end
+
+
+	love.graphics.printf("test???", 340, 258, 200, "left")
+
+end
+
+function ChallengeSelectScene:onInputRelease(e)
+	if e.input == "up" or e.scancode == "up" then
+		self.das_up = nil
+	elseif e.input == "down" or e.scancode == "down" then
+		self.das_down = nil
+	elseif e.input then
+		self.secret_inputs[e.input] = false
+	end
+end
+
+function ChallengeSelectScene:changeOption(rel)
+			self:changechallenge(rel)
+			playSE("cursor")
+end
+
+
+
+function ChallengeSelectScene:changechallenge(rel)
+	local len = table.getn(challenges)
+	self.menu_state.challenge = Mod1(self.menu_state.challenge + rel, len)
+end
+
+
+
+return ChallengeSelectScene
diff --git a/scene/mode_select.lua b/scene/mode_select.lua
index d35594c..a7db60e 100755
--- a/scene/mode_select.lua
+++ b/scene/mode_select.lua
@@ -1,6 +1,6 @@
 local ModeSelectScene = Scene:extend()
 
-ModeSelectScene.title = "Game Start"
+ModeSelectScene.title = "Freeplay"
 
 current_mode = 1
 current_ruleset = 1
diff --git a/scene/title.lua b/scene/title.lua
index 446a8d5..b5c22c0 100644
--- a/scene/title.lua
+++ b/scene/title.lua
@@ -5,6 +5,7 @@ TitleScene.restart_message = false
 
 local main_menu_screens = {
 	ModeSelectScene,
+	ChallengeSelectScene,
 	SettingsScene,
 	CreditsScene,
 	ExitScene,
diff --git a/tetris/challenges/Tetrs.lua b/tetris/challenges/Tetrs.lua
new file mode 100644
index 0000000..58f68e4
--- /dev/null
+++ b/tetris/challenges/Tetrs.lua
@@ -0,0 +1,26 @@
+require 'funcs'
+
+local GameMode = require 'tetris.modes.gamemode'
+local Piece = require 'tetris.components.piece'
+local Grid = require 'tetris.components.grid'
+local Randomizer = require 'tetris.randomizers.randomizer'
+local Bag7Randomizer = require 'tetris.randomizers.bag7noI'
+local MarathonGF = require 'tetris.modes.marathon_gf'
+
+local TetrsChallenge = MarathonGF:extend()
+
+TetrsChallenge.name = "Tetrs"
+TetrsChallenge.hash = "Tetrs"
+TetrsChallenge.mode = "MarathonGF"
+TetrsChallenge.ruleset = "Standard"
+TetrsChallenge.tagline = "abababa"
+TetrsChallenge.description = "Complete a mode with a specific ruleset and idk they did some other stupid things too lol"
+
+function TetrsChallenge:new()
+
+    TetrsChallenge.super:new()
+  self.randomizer = Bag7Randomizer()
+  self.next_queue_length = 6
+end
+
+return TetrsChallenge
diff --git a/tetris/challenges/challenge.lua b/tetris/challenges/challenge.lua
new file mode 100644
index 0000000..7f777b1
--- /dev/null
+++ b/tetris/challenges/challenge.lua
@@ -0,0 +1,23 @@
+-- currently you need to require and extend the gamemode you're making a challenge out of
+
+require 'funcs'
+
+local GameMode = require 'tetris.modes.gamemode'
+local Piece = require 'tetris.components.piece'
+local Grid = require 'tetris.components.grid'
+local Randomizer = require 'tetris.randomizers.randomizer'
+local BagRandomizer = require 'tetris.randomizers.bag'
+local MarathonGF = require 'tetris.modes.marathon_gf'
+
+local Challenge = GameMode:extend()
+
+Challenge.name = "A really cool challenge name"
+Challenge.hash = ""
+Challenge.mode = ""
+Challenge.ruleset = "Guideline SRS"
+Challenge.tagline = "Are you up for this challenge?"
+Challenge.description = "Complete a mode with a specific ruleset and idk they did some other stupid things too lol"
+
+
+
+return Challenge
diff --git a/tetris/modes/gamemode.lua b/tetris/modes/gamemode.lua
index 2c805e3..2ae7b1d 100644
--- a/tetris/modes/gamemode.lua
+++ b/tetris/modes/gamemode.lua
@@ -143,7 +143,7 @@ function GameMode:update(inputs, ruleset)
 	) then
 		self:onAttemptPieceRotate(self.piece, self.grid)
 	end
-	
+
 	if self.piece == nil then
 		self:processDelays(inputs, ruleset)
 	else
@@ -243,7 +243,7 @@ function GameMode:update(inputs, ruleset)
 			if self.immobile_spin_bonus and
 			   self.piece.last_rotated and (
 				self.piece:isDropBlocked(self.grid) and
-				self.piece:isMoveBlocked(self.grid, { x=-1, y=0 }) and 
+				self.piece:isMoveBlocked(self.grid, { x=-1, y=0 }) and
 				self.piece:isMoveBlocked(self.grid, { x=1, y=0 }) and
 				self.piece:isMoveBlocked(self.grid, { x=0, y=-1 })
 			) then
@@ -251,7 +251,7 @@ function GameMode:update(inputs, ruleset)
 			end
 
 			self.grid:applyPiece(self.piece)
-			
+
 			-- mark squares (can be overridden)
 			if self.square_mode then
 				self.squares = self.squares + self.grid:markSquares()
@@ -312,7 +312,7 @@ function GameMode:onAttemptPieceRotate(piece, grid) end
 function GameMode:onPieceMove(piece, grid, dx) end
 function GameMode:onPieceRotate(piece, grid, drot) end
 function GameMode:onPieceDrop(piece, grid, dy) end
-function GameMode:onPieceLock(piece, cleared_row_count) 
+function GameMode:onPieceLock(piece, cleared_row_count)
 	playSE("lock")
 end
 
@@ -616,7 +616,7 @@ function GameMode:drawLineClearAnimation()
 	-- animation function
 	-- params: block x, y, skin, colour
 	-- returns: table with RGBA, skin, colour, x, y
-	
+
 	-- Fadeout (default)
 	--[[
 	function animation(x, y, skin, colour)
@@ -728,8 +728,8 @@ function GameMode:drawNextQueue(ruleset)
 	if self.hold_queue ~= nil and self.enable_hold then
 		self:setHoldOpacity()
 		drawPiece(
-			self.hold_queue.shape, 
-			self.hold_queue.skin, 
+			self.hold_queue.shape,
+			self.hold_queue.skin,
 			ruleset.block_offsets[self.hold_queue.shape][self.hold_queue.orientation],
 			-16, -32
 		)
@@ -828,7 +828,7 @@ end
 
 function GameMode:drawSectionTimesWithSplits(current_section, section_limit)
 	section_limit = section_limit or math.huge
-	
+
 	local section_x = 440
 	local split_x = 530
 
@@ -843,7 +843,7 @@ function GameMode:drawSectionTimesWithSplits(current_section, section_limit)
 			love.graphics.printf(formatTime(split_time), split_x, 40 + 20 * section, 90, "left")
 		end
 	end
-	
+
 	if (current_section <= section_limit) then
 		love.graphics.printf(formatTime(self.frames - self.section_start_time), section_x, 40 + 20 * current_section, 90, "left")
 		love.graphics.printf(formatTime(self.frames), split_x, 40 + 20 * current_section, 90, "left")
diff --git a/tetris/randomizers/bag7noI.lua b/tetris/randomizers/bag7noI.lua
new file mode 100644
index 0000000..922e867
--- /dev/null
+++ b/tetris/randomizers/bag7noI.lua
@@ -0,0 +1,19 @@
+-- for the pre-packaged/example challenge tetrs
+
+local Randomizer = require 'tetris.randomizers.randomizer'
+
+local Bag7NoIRandomizer = Randomizer:extend()
+
+function Bag7NoIRandomizer:initialize()
+	self.bag = {"J", "L", "O", "S", "T", "Z"}
+end
+
+function Bag7NoIRandomizer:generatePiece()
+	if next(self.bag) == nil then
+		self.bag = {"J", "L", "O", "S", "T", "Z"}
+	end
+	local x = math.random(table.getn(self.bag))
+	return table.remove(self.bag, x)
+end
+
+return Bag7NoIRandomizer