Let's be honest here, "Undertale" is an amazing game, and one of the best things about it is its OST. Easily one of the best OSTs made for ANY game in a long time, most of it is incredibly addictive, however, the boss themes take the cake for some of the catchiest songs I've heard in a long, LONG time. Here are my favorite themes in the game, and they are songs that I'd definitely recommend you to give a listen.
Song: Bonetrousle
From: Undertale
Artist: Toby Fox
Was there any doubt that everybody's favorite funky skeleton's theme wouldn't make the list? I didn't quite enjoy Toriel's theme as much as everybody did, but Papyrus's theme...now this was some funky shit. While the battle started off ridiculously easy with his normal theme playing, there was almost no feel of threat, it was more of a joke. When he caught you off guard with his blue attack and "Bonetrousle" started playing, shit got real. While its just "Nyeh Heh Heh" with drum beats added it, it shows you how brilliant the song is and how just simple drum beats can make the song into a cool boss theme. Like almost every boss in the game, Papyrus's fight was a blast, and the song only made it better.
Song: Spider Dance
From: Undertale
Artist: Toby Fox
Really just Napstablook's theme on drugs and weed, "Spider Dance" got me jumping up and down during the entire time while trying to dodge Muffet's attacks. Like many songs in the game, even though this is a tweaked version of another theme in the game, its amazing how much the song changes to suit the flow of this particular fight. Particularly because Muffet's battle feels like you're playing a rhythm game, this one is incredibly catchy and amazing to listen to. Mechanics wise, this is my favorite fight in the game. "Spider Dance" just gets you to bop to the beat as you try to bop through Muffet's deadly attacks. God damn that muffin is scary as shit.
Song: Battle Against A True Hero
From: Undertale
Artist: Toby Fox
Was there ANY doubt that this wouldn't be on the list? To have to go through the crappiest route in the game to hear 2 best songs in the game and to fight the 2 most challenging bosses is just sad. "Battle Against A True Hero" is the closest thing to the most epic song for the most epic scenario in the game. The moment when Undyne raises herself from the dead to fight against you, the monster hiding in a human's body, is just full of epicness. Then she dons her special armor, her eye glows, and this theme plays....its too good. The song itself is just amazing, the tension levels have never been so high in "Undertale", and you just want to fight to the very DEATH with this song in the background! To top it off, Undyne is tough as nails in this battle, probably the 2nd hardest battle in the game. Its you or her, and lets be honest, we're not about to lose since we have infinite attempts.
Song: Death By Glamour
From: Undertale
Artist: Toby Fox
Let's f**king go. "Battle Against A True Hero" was the most epic song in the game, but "Death By Glamour"...its something else. Its the song with the most HYPE in the game, hands down. Words cannot describe how hyped up I was with this song in the background when I was having a pose war against Mettaton EX. In terms of atmosphere and overall likability, this was very easily my favorite boss battle in the game. Sure, it may not be exceedingly difficult or as fun mechanical-wise as the Muffet boss battle, but this fight was...just so freaking amazing. It was like the dance off of the century to determine the savior of Earth, Mettaton was strong and more than capable of being mankind's savior, and instead of a death battle, we get a dance off because he's just that fabulous. The battle was so random and funky, with this in the background, you just want to get down and dirty while being a Jojo pose master. All while trying to raise the ratings...THEY'RE OFF THE CHARTS.
Song: Megalovania
From: Undertale
Artist: Toby Fox
Video game OST of the year. "Megalovania" is just the very definition of awesomeness, and it says something that this piece got over 3 million freaking views on "Youtube", which is on par with some of the most popular pieces of video game music. This plays during the battle against Sans, the hardest and most satisfying battle in "Undertale", and while I didn't think this was a suiting song to play against such a badass, I soon grew to absolutely love it as I kept dieing to Sans. Sans is a complete monster, seeing as how he could easily destroy you in any of the other routes, he chose not to unless he absolutely had to...like in the genocide route. This song, while surprisingly upbeat, ironically portrays you as a demon, and Sans is probably the demon slayer. Its an incredibly catchy song, and I must say that its impossible to get this song out of my head, unfortunately, that's how good it is.
