UNDERTALE (Anime franchise)

UNDERTALE is an anime franchise by Toby Fox and Temmie Chang. It has 2 shows and 2 movies, as well as a spiritual successor franchise, DELTARUNE, which itself has 2 shows.

UNDERTALE (Anime show)
UNDERTALE is focused around the main character, Frisk, going through the underground while other monsters are being spared by Frisk. There are 5 seasons and a movie that ends off the series.

Season 1:

 * S1E1: Fallen Down, focuses on Flowey introducing Frisk, and Toriel preventing Flowey from causing harm.
 * S1E2: Catacombs, focuses on Frisk adventuring Ruins and finding new monsters, sparing each one.
 * S1E3: Ghostly Battle, focuses on the Frisk and Napstablook battle.
 * S1E4: Ruins, focuses on Frisk adventuring the rest of the underground without Toriel.
 * S1E5: Home, focuses on Frisk entering Toriel's house.
 * S1E6: Heartache, focuses on the Frisk and Toriel battle, as well as Sans being introduced.

Season 2:

 * S2E1: HUMAN!, focuses on a broad introduction of Sans and Papyrus.
 * S2E2: Patience and Bravery, focuses on Frisk travelling through Snowdin Forest and encountering + sparing monsters.
 * S2E3: Puzzling, focuses on Frisk trying to solve Papyrus' puzzles.
 * S2E4: A Town Called Snowdin Town, focuses on Frisk travelling through Snowdin.
 * S2E5: Puzzling Further, focuses on more Papyrus puzzles.
 * S2E6: Integrity, focuses on the Frisk and Papyrus battle, as well as a mini introduction of Monster Kid and Undyne.

Season 3:

 * S3E1: Scary, focuses on Monster Kid helping Frisk through Waterfall while avoiding Undyne.
 * S3E2: Waterfall, focuses on Frisk adventuring Waterfall.
 * S3E3: Run Away, focuses on Undyne trying to kill Frisk with spears.
 * S3E4: A Faint Memory, focuses on Frisk going through the Trash Zone and Waterfall, and fighting Mad Dummy.
 * S3E5: A Swim, focuses on more adventuring through Waterfall.
 * S3E6: Kindness, focuses on the Frisk and Undyne battle.

Season 4:

 * S4E1: Alphys, focuses on the introduction of Alphys, her lab, and Mettaton.
 * S4E2: Hotland, focuses on exploring Hotland.
 * S4E3: Mettaton's Plans, focuses on Mettaton's malicious plans. and game shows.
 * S4E4: Perserverance, focuses on the Frisk and Muffet battle, and the Dungeon.
 * S4E5: Approaching CORE, focuses on the Hotel.
 * S4E6: CORE, focuses on the CORE.
 * S4E7: Justice, focuses on the Frisk and Mettaton EX battle.

Season 5:

 * S5E1: A Story to Tell, focuses on the story of Asriel and the first fallen human in New Home.
 * S5E2: Last Corridor, focuses on Sans judging the player's actions.
 * S5E3: ASGORE, focuses on the Frisk and Asgore battle.
 * S5E4: Idiot, focuses on the Frisk and Photoshop Flowey battle.
 * S5E5: Undyne and Alphys, focuses on the Undyne and Alphys date.
 * S5E6: True Lab, focuses on Frisk travelling True Lab.
 * S5E7: But What's Next?, focuses on Frisk witnessing Flowey hurting several monsters you've encountered in the past.

UNDERTALE: ASRIEL DREEMURR
The movie is the Frisk and Asriel fight, as well as the ending.

UNDERTALE GENO
UNDERTALE GENO is a what if version of UNDERTALE where instead of Frisk sparing every monster, they kill every monster. The only consistent difference between episodes is that Frisk kills every monster, creepy hints are spilled throughout, characters seem a bit more scared, and the background music is always a bit slower and lower pitched. Also, not much characters, minus important characters and monsters, are seen.

Season 1:

 * S1E1: Fallen Down [GENO] | Differences: None
 * S1E2: Catacombs [GENO] | Differences: None
 * S1E3: Ghostly Battle [GENO] | Differences: None
 * S1E4: Ruins [GENO] | Differences: A voice in Frisk's head continuously plays, saying "But nobody came."
 * S1E5: Home [GENO] | Differences: Toriel is a bit more hesitant of your human traits.
 * S1E6: Heartache [GENO] | Differences: Toriel is killed by a slash. Her dust fades away, revealing a monster SOUL, the first time one has been seen since none were featured in the original series.

Season 2:

 * S2E1: HUMAN! [GENO] | Differences: Sans warns you about consequences Frisk will face if they don't stop.
 * S2E2: Patience and Bravery [GENO] | Differences: Sans yet again warns you.
 * S2E3: Puzzling [GENO] | Differences: Frisk ignores Papyrus' puzzles.
 * S2E4: A Town Called Snowdin Town [GENO] Differences: All characters, excluding Monster Kid, Sans, and Papyrus, have run away. Notably, Snowdin Shopkeeper has a note that says "Please don't hurt my family."
 * S2E5: Puzzling Further [GENO]: | Differences: Frisk yet again ignores the puzzles.
 * S2E6: Integrity [GENO] | Differences: Papyrus dies, the dialogue is much different and longer, and the Monster Kid and Undyne intro is more brief.

Season 3:

 * S3E1: Scary [GENO] | Differences: Monster Kid is scared.
 * S3E2: Waterfall [GENO] | Differences: None
 * S3E3: Run Away [GENO] | Differences: None
 * S3E4: A Faint Memory [GENO] | Differences: Mad Dummy is much more easily killed, and is now Glad Dummy. Also, there is no message after you fall.
 * S3E5: A Swim [GENO] | Differences: None
 * S3E6: Kindness [GENO] | Differences: Undyne is now Undyne the Undying, and Frisk trys to kill Monster Kid.

Season 4:

 * S4E1: Alphys [GENO] | Differences: Alphys is no where to be seen, and Mettaton calls you a murderer.
 * S4E2: Hotland [GENO] | Differences: None
 * S4E3: Mettaton's Plans [GENO] | Differences: No game shows or malicious Mettaton acts. Just a murder spree.
 * S4E4: Perserverance [GENO] | Differences: Muffet dies, and the Dungeon part isn't there.
 * S4E5: Approaching CORE [GENO] | Differences: None
 * S4E6: CORE [GENO] | Differences: None
 * S4E7: Justice [GENO] | Differences: Mettaton turns into Mettaton NEO, dying in only one hit.
 * S4E8: A Story to Tell [GENO] | Differences: Instead of monsters explaining the story, Flowey is trying to communicate with the first fallen human.

UNDERTALE GENO: sans
The movie is centered around the ending of UNDERTALE GENO and the Frisk and Sans battle.