Toby Fox is a huge fan of OFF and has been well before the release of Undertale, basing Ghost Fight on the game's theme Peper Steak and Sans on the characters Zacharie and the Judge. This OFF character was also his basis for Undertale's Papyrus.
Who is Dedan?
There are this many types of item avaliable to players during a run, including purple items and blue items.
What is 7?
This character canonically fought in WWII for Italy and lived.
Who is Joseph Cross?
This is the three letter name given to the values that "Goner Appearances" rely on. These values are randomly assigned every time the game loads a new room.
What are FUN values?
Celestia dropps these on nations to keep them in check. These are responsible for landmarks like The Chasm and Dragonspine.
What are Nails?
On of the final bosses of OFF is a woman named Vader Eloha, the mother of Hugo or the child from The Room. With a theme called "The Woman of Your Dreams", what is her title?
What is The Queen?
This color is used to mark boss or planet items.
What is Yellow?
This character wanted to get into Valhalla so badly he had his wife slap him on on his deathbed to get there, and it worked.
Who is Sir Roland?
Frisk is the canon name of the protagonist in Undertale. When used as a player's name, this mode is unlocked with brand new monsters to fight, though it still only lasts until the end of the Ruins.
What is Hard Mode?
This is the real/Archon name of Zhongli, the Geo Archon, or Rex Lapis.
What is Morax?
This hidden character hints at the Batter's true form during their fight, referring to him as a "big ducky."
Who is Sugar?
The final boss in RoR2 is Mithrix, the "King of Nothing". His brother, the final boss of RoR1 is called this.
Who is Providence?
This character goes by they/them pronouns not because they're non-binary but because they're the souls of hundreds of men in a suit of armor.
Who is Magyar?
This is the text that appears when a player tries to use their cellphone in the Dark World in Deltarune after the release of Chapter 2. The sound effect used had no text in Chapter 1, and was used before in Undertale during W. D. Gaster's entry number 17. Fun fact, it's actually a slowed down version of Muffet's laugh.
What is "It's nothing but garbage noise."
This name is given to the group of leaders from the old nation of khaenri'ah.
Who are the Sinners?
The Judge serves as our guide through the game of OFF on our quest to purify the zones. He appears to us as this.
What is a Cat?
This well fitting name is given to the world that RoR2 takes place on.
What is Petrichor V
Henry Coates, also known as Sentinel, the the first and greatest costumed superhero in America, also canonically held this title before joining Valhalla after death.
What is President of the United States of America?
Toby Fox has stated that this Deltarune character would have had a battle as a minor boss in Chapter 1, however it was scrapped alongside their battle theme. Toby felt that they were "not very epic at all" and that they should have died in one hit, simmilar to Mettaton Neo in Undertale.
Who is Rouxls Kaard?
This race had half of their powers taken to form each of the Seven's gnosis and were the rulers of each nation before the Archon war.
What are Dragons?
The world of OFF has 4, well actually 5, core elements: this, Metal, Plastic, Meat, and Sugar.
What is Smoke?
The RoR2 soundtrack uses a lot of interesting time signatures including Antartic Oscillation which uses this time.
What is 7/4?
Volkov the Vampire King ruled over all of Batvia in Brawlhalla lore before arriving in Valhalla. This character, as the son of the "Mad King" of Batvia, refers to Volkov as "Gramps".
Who is Caspian?
The Legend of the Deltarune, as told by Ralsei in Chapter 2 of Deltarune, tells of an entity called The Knight causing the end of both the light and dark worlds. This event is called this, or the "Dark Truth."
What is The Roaring?
This is the name of the Electro Archon before Ei - her twin sister.
Who is Raiden Makoto?