Bad Monday Simulator
Undergarf is where the characters of Garfield and Undertale combine. It's a carefree place, free of war and strife. Free of mondays! You play as Nermal, who stumbles upon this world and challenges Sansfield, the fusion of Sans and Garfield, to the ultimate duel.
UNDERGARF INTRO
UNDERGARF CAST (COMING SOON)
SANSFIELD VS NERMAL (COMING SOON)
MONDYMANIA (COMING SOON)
Bad Monday Simulator has it's own category on Twitch! Also:

monD monKEKW monPray monRIP monS
monTalk monLaugh monZZZ monSadge monLasagna

Bad Monday Simulator is drawn by myself, Lumpy.
programmed by Spasco
and has music by Polarial
Inspired by the works of Toby Fox
Inspired by the works of the immaculate Jim Davis.
Additional music used:
【無料フリーBGM】パイプオルガンの明るく荘厳な曲「Pray Organ3」 https://peritune.com/blog/2020/12/07/pray_organ3/
【無料フリーBGM】パイプオルガンの悲しいレクイエム「Pray_Organ2」 https://peritune.com/blog/2019/11/10/pray_organ2/

- FAQ: I'm not hearing any music! How can I fix it? A: Try reopening your web browser.
- FAQ: Will the soundtrack be releasing? A: YES. It'll be on YouTube soon.
- FAQ: How many endings are there? A: 6. 2 for Normal Mode. 2 for Hard Mode. 2 for Monday Mode.
- FAQ: Monday Mode seems impossible. A: That's not a question. And yea, it is. I can't beat the game on Monday, that's for sure.
- TIP: Praying sometimes summons a rare Pasta Fairy! Try doing some PRAYS early, and if you're lucky, maybe you can stockpile some healing items!
- TIP: Sansfield inflicts poison/karma damage when he hits you. This is displayed as purple health and slowly ticks down. Items cure poison/karma and THEN heal you! So healing quickly means you can recover more hp!
- TIP: When Sansfield is sleeping, he prefers to not be disturbed.
Feel free to use this artwork from the game for YouTube Thumbnails/articles, etc.
Latest update is live!
-WASD controls added.
-all videos are now unlocked!
-some more bugfixes
Status | Released |
Platforms | HTML5 |
Rating | Rated 4.8 out of 5 stars (677 total ratings) |
Authors | Lumpy, Spasco |
Genre | Role Playing |
Made with | GameMaker |
Tags | Boss battle, Fangame, Indie, lumpy, Parody, Pixel Art, Singleplayer, Undertale, video |
Comments
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pls make a downloa
LATAM INCLUSION AQUI
fuck you lumpytouch
Ur dumb or what kiddo? You're getting reported this very instant
couple o ideas. 1:if you always pray, that you get a secret boss fight vs godfeild with 1 ending: u die. another, a pray outcome where the screen glitches, and the text is not there. after the next attack whitch is double (double everything), if no-hit then 150 dmg to sansfeild. if 1 "hit" (yes, invincibiity frames added) then 100 dmg to sansfeild, 2-3, 50 dmg to you+sans, any more then u dead. and new item called ravioli. +??? hp (depends, random from -1 to 50) and there is a different text for each "flavor" of ravoli (-1= sugar, 50=lasagna). plz update soon =)
Where is the sound and audio on mobile?
suicide route
you will do suicide route NOW *in sansfield voice*
please add a easy mode
It's what makes it fun, it's hard and makes you rage.
where are the downloads
awesome but i cant beat i
nvm i beat i
idea for the burger attack in hard mode; make the drops blue attacks
I love lumpy and this game.
Sadly, this STUPID cat is killing me and LAUGHING.
I love the animations tho!
how to beat the bones
you should make the whole game of undertale based around this and and easy mode for this fight sim (normal mode but nermals attacks do more, garfeilds hits do less, more health, and higher chances for most of the pray.) btw frimmel (frisk + nermal) and charmel (chara + nermal)
garfiel arround?
update this game its so fun
can i download it?
amazing game but its hard
skill issue fr
I dont know why it is so fucking hard to get a pasta fairy from praying,lumpy please buff the chances of getting a pasta fairy from praying
i think its an skill issue my bro
bro damn
thats like- (googles) 1 in 10,000. wow.
i wish there was fullscreen
me too your best bet is zooming in (ctrl and + key)
there is?
THIS GAME TRULY IS A MASTERPIECE!!
HOLY SHIT 😭😭😭 THIS GAME IS SO HARD BUT SO GOOD
Congratulations you have been chosen for the boss fight of the year! (2025) you have been elected to compete with other prize winers in a game jam! do you except?
good
this is so hard
I hate the shooty bears I lose to them every time
i think its the explosive balls slowing you down not the beams themselves
Hehehehhhehehhehehhehehehehehhehe you said balls hehehehehehhehehhehhehee
child much?
NO I AM A BIG BOY MY MOMMY SAID SO ):<
u playin or 4 real bro
totally garn-aricle
er er er
e p i k
cool!
this is amazing
can't.
how fullscreen
I swear is there anyway to dodge the clock animation. like at all
idk maybe you have to gamble a random stat boost
wha-
yes there is go to the bottom middle at the start of the clock and then go to the bottom right and move back and forth you should dodge most of it
cool game but zzz too hard
SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED SKILL ISSUE DETECTED
fuck
Lowkey is there a tactic for when he's sleeping, I can do the sheep and everything else, But not the ZZ's. what do I need to do?.
nv i figured out how to do it, i just need to work on it more
YESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
guys how do you get past the sleeping stage
you let him heal to full hp
where, is, my, pipe?
(GARFIELD SMOKING SOUNDS)
GARFIELD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA (Dies)