Work in Progress. UNMARKED (UNDERTALE AND NAS) SPOILERS ABOUND.
This is an attempt to pin exact numbers on the events of Not as Simple, and is not anything close to exact. All measurements are imprecise, but the most uncertain ones are marked * as such and explained.
Before Integrity
~2002*(* Chara fell in 201X. For the sake of ease, here they're marked as having fallen in 2015.)
- Chara is born.
~2004
- Asriel is born.
~2010
- Bravery is born.
~2015
- Chara falls, and is taken in by the Dreemurrs.
- Chara dies. Asriel absorbs their soul and crosses the border, supposedly to bring them to their favorite flowers on the Surface. (Having played Undertale, we know this is really a plan to collect six human souls.) Asriel is attacked by humans and refuses to fight. He makes it back to the throne room and dies. Asgore declares war on humanity. Toriel does not condone this.
~2018
- Bravery falls, and Toriel disappears to raise him in the Ruins.
- A few months later, Bravery sneaks out to buy Toriel a birthday cake, and is found in Snowdin. Asgore kills him. Gaster is present. Gaster is horrified, but he’s young (“barely even close to being considered an adult”) and close to Asgore, and tells himself it’s for the good of Monsterkind and he’ll understand better when he’s older.
~2024
- Kindness is born.
~2036*(* According to Gaster, just prior to Kindness.)
- Gaster inherits the Royal Scientist position.
~2038
- Kindness is captured because he stops fleeing to help a monster. When they bring him to Asgore, he appeals to Asgore’s sense of ethics; Asgore hesitates but kills him. Gaster is present and doesn’t know what to think.
~2085*(* Perseverance fell “some time” after Kindness.)
- Perseverance is born.
~2098
- After months of rumors, Gaster discovers Perseverance in his lab. She tells him she’s met him once before, in a prior timeline, and asks him to help her. She and Gaster study the timelines, and become very close.
- A few months later, an old assistant becomes suspicious of Gaster and goes to Asgore. Asgore doesn’t believe him, but visits Gaster with a set of guards to provide reassurance. Asgore and the guards discover Perseverance eating lunch. Gaster tries to defend her, and absolute chaos breaks out. Someone accidentally starts a fire. Perseverance is fatally hurt and Asgore finishes her off. Gaster is devastated and completely hates Asgore. Strato Cumulus is present.
In the year of our Integrity
~2126(* Integrity fell “several decades” after Perseverance.)
- Sans is born.
- Integrity is born.
~2136
- Integrity does most of the chores around her house. Punishments for imperfection are physical violence, confinement to closet, and denial of food. Integrity's grades worsen. She is punished more for this.
- Sans and Papyrus wash up in Waterfall.
~2137
- Integrity skips school most days to clean the house or steal food from local shops. She is failing her classes, and is always tired. When she does attend school she's made fun of.
- Integrity takes shelter from the rain under the awning of a dance studio, and is invited inside. The teacher is impressed, and Integrity begins going every day.
- Integrity begins attending school more often.
- Integrity's dance teacher buys her a phone.
~2138
- Integrity's father loses his job, and the abuse worsens.
- Integrity is caught stealing food from a shop. When the police return her she's physically abused by both of her parents.
- Integrity takes her anger out on a boy who tries to steal her ballet shoes. He begs her to stop; she keeps kicking him until she's dragged away by a teacher. She runs away and ends up at Mt. Ebott, where she attempts suicide but ends up in the Underground.
Integrity and Sans’s time shenanigans. Integrity resets 26 times; they go through 27 timelines.
First Timeline
- Integrity leaves the ruins and meets Sans.
- He brings her to Grillby's; they're discovered by guards. They run away and slip on the ice on the border of Snowdin, where Integrity's killed by the guards.
Second Timeline
- Integrity respawns at the Ruins door, where Sans is the only one who remembers her.
- They meet Grillby at his house, where he gives her a cloak to disguise her humanity, and she gives him a charm as thanks.
- Sans and Integrity pick up Papyrus from Gerson, who immediately recognizes Integrity as a human, but doesn't do anything about it. Integrity gives Papyrus a pink rock, and Sans sends him to stay with Grillby.
- Sans and Integrity go to barter with the Temmies. Sans uses his emergency supply of tradeable items to get some basic information. Integrity trades some things from her backpack for relevant news and a winter coat for Papyrus.
- Integrity makes a new save point.
- Sans and Integrity are discovered by a guard on their way to Hotland, whom Integrity tells she's Sans's sister. Integrity's cloak comes undone, and when they run from the guards, they're killed by a cave-in.
Third Timeline
- Integrity and Sans respawn in Temmie Village.
- Sans and Integrity are cornered by guards and Sans teleports them away.
- Sans's teleportation skills are imprecise, and the two almost fall off the edge of Waterfall. He uses gravity magic to get them to safety.
- Integrity finds a camera.
- They go to the cave where Sans and Papyrus live.
- Integrity tells Sans about her childhood and how she fell; she also tells him that she wants to live. Sans tells her about his life in turn.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Fourth Timeline
- Integrity and Sans respawn at home (in the cave).
- Integrity and Sans are killed by guards.
Fifth Timeline
- Integrity and Sans respawn at home.
- Integrity and Sans are killed by guards.
Sixth Timeline
- Integrity and Sans respawn at home.
- Integrity and Sans are killed by guards.
Seventh Timeline
- Integrity and Sans respawn at home.
- Sans starts logging how many times they've died.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Eighth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Ninth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Tenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- They come across the memorial statue/'His Theme' music box.
- Integrity and Sans are killed by guards.
Eleventh Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity brings an umbrella, and uses it to shield the music box so it can play. Integrity thinks the song sounds sad; Sans thinks it sounds happy. They conclude that it's both at the same time.
- Integrity and Sans are killed by guards.
Twelfth Timeline
- Integrity and Sans respawn at home.
- They take a lot of photos. (They will continue doing this from this point on.)
- Integrity makes a new save point.
- They take a nap.
- Integrity tries to teach Sans how to swing dance. (She will continue doing this from this point on.)
- Wren shows up at the cave to listen to Integrity's music. (They will continue doing this when applicable from this point on.)
- Integrity and Sans are killed by guards.
Thirteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Fourteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Fifteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Sixteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Seventeenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Eighteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Nineteenth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Twentieth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Twenty First Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity drowns.
Twenty Second Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Twenty Third Timeline
- Integrity and Sans respawn at home.
- Sans begins to understand that the guards are forming instincts about where he and Integrity will be.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Twenty Fourth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Sans braids Integrity's hair. (He will continue doing this from this point on.)
- Integrity and Sans are killed by guards.
Twenty Fifth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Integrity and Sans are killed by guards.
Twenty Sixth Timeline
- Integrity and Sans respawn at home.
- Integrity makes a new save point.
- Sans dies when he takes an arrow meant for Integrity.
- Integrity is killed by guards.
Twenty Seventh Timeline
- Integrity and Sans respawn at home.
- Integrity chews Sans out for sacrificing himself, because time only resets when she dies.
- Integrity makes a new save point.
- Sans and Integrity pack.
- They teleport.
- They fight three guards, and run from more.
- Integrity loses her ballet shoes and tutu in the river.
- Sans and Integrity are surrounded by guards; they begin to fight (very well).
- Integrity takes a spear meant for Sans, and begins to die.
- A guard traps Integrity's soul.
