Some Re:Zero fanfic ideas, crossover mostly

Big Sonic 4: More detailed order of events:

List of events from what would be known to the general public and/or experienced by the general public expanded(with some added time stuff and a small amount of suggestions for what to do with some of them, I try to warn about spoliers beyond S2 of the Re:Zero anime)(spoilers to almost all sonic games):

Sonic 1: Robotnic's pollution would be known and also some events that happen near urban zones like Spring Yard and Starlight. Local pollution was fixed at the end.

Sonic CD: Little Planet is covered by a metallic dome then it is fixed. Also, potentially stuff that happens in urban areas such as Stardust Speedway.

Sonic 2 16-bit: Stuff that happens near the urban areas, possibly wing fortress's existence and bombling of West Side island, Giant space station being launched and crashing down.

Sonic 3 & Knuckles: Giant space station crashed into a floating island, causing it to land in the ocean and cause a tsunami. The space station then launched into space properly and was destroyed and the island went back into the sky.(The launch base launch was stopped very quickly so it probably wouldn't be known about). Can justify Doomsday Zone chase being partially known by the footage being caught by a random satellite that was observing the random space station.

Sonic 2 8-bit: No urban areas, so it isn't known to the public at all.

SegaSonic the Hedgehog: If anything is known, then it is that Eggman owns an island, tower exploded?

Sonic Chaos: Stuff that happens near Gigapolis zone and also the island partially sinking thanks to the lack of Chaos emeralds?(if the latter part is cannon)

Sonic Spinball: Sonic destroys an Eggman fortress island?

Sonic Triple Trouble: I think the previously "everlasting summer" island that Robotnik trapped in permanent winter thanks to testing his ultimate weapon would be known to the public(Subaru can comment about this being similar to Elinor Forest when he finds out about that).

Knuckles' Chaotix: Random island appears, Chaotix are just randos that went to it, so a news crew or few most likely also came. Robotnic builds a resort as his base. A giant red laser-shooting robot is destroyed by Knuckles and the Chaotix

Tails' Skypatrol: A group calling themselves the Witchcarters took over some isolated island, final battle was in the Dark Castle, in view of some cityscape, so the Witchcarters' abilities and how Tails made them retreat could be known.(Boost by how wacky they are, stereotypical appearance Witch with the ability to encase people in crystal that talks in rhyme and exclusively rides in a minecart for some reason with 3 minions that are in hovercraft calling themselves the Witchcarters taking over an island and placing rails everywhere before being forced to retreat by a 2-tailed flying 8-year old seems like it would be in the news, even if the place that it took place on an isolated island, the place has a city with skyscrapers)

Tails Adventure: Takes place on an island not on maps, so probably not known. The Battle Kukku Empire disappeared, though(occasional conspiracy theory about that?).

Sonic Labyrinth: Takes place in a labyrinth, so unknown

Sonic the Fighters: Another Death egg is launched and taken down

Sonic 3D Blast: Not known to the public at all

Sonic Blast: Specifics unknown to the public (Eggman did create a artificial island resembling the Death Egg near South Island which was sunk into the ocean shortly after launching into the air)

Sonic R: Televised Grand Prix, also goes through city

Sonic Mania: Stuff that happens near the city levels, including Flying battery going over Casinopolis? Little planet metallic dome again and stuff happening on it, followed by that being fixed again.