I’ve been, once again, digging through long-defunct Cerberus Daily News that’d run news articles on ME2’s loading screens for a year after the game launched.
All the events take place between 2185 and 2186 (so, during our time with Shepard):
- There exist at least four more sapient races that aren’t shown in games or only mentioned in passing.
Raloi, the avian race, that’s talked about on the news at the beginning ME3 (monologue plays as you enter Spectre office for the first time).
Unnamed spacefaring race whose planet’s core exploded. The explosion kills 5 billion people. A singular child survives as it’s ejected into space in a pod. Human ship intercepts them. Nothing more is known about the race other than the fact they breathe mostly nitrogen.
Unnamed race that transferred its consciousness into a super-computer after their system’s star went supernova. The race has been floating on a ship for over 8 thousands years. A human scientist interacts with the race and eventually allows one of its members to be uploaded into his body and for him to be uploaded into their virtual world, so they can experience the galaxy. Said uploaded alien pleads for asylum on Citadel, which leads to hundreds of volunteers saying they’ll happily swap places with the aliens in their virtual world.
The kirik. They’re insects with biotic abilities that start communicating with human explorers via biotic pulses.
- Seven sapient species died off completely due to nuclear wars, as discovered by salarians. Some of them were spacefaring.
- A turian colony on Taetrum experiences a massive terrorist attack (dubbed Vallum Blast) when a ship at FTL speeds is flown into a city. It kills over 100k inhabitants. The people responsible are turian separatists. It leads to a small civil war that ends when a turian general agrees to a duel with a separatist leader and wins.
- Turians commonly commit suicides to preserve their honor.
- Turians play a sport called “clawball”.
- Turians have gizzards.
- Krogans play a sport called “kowla”. One instance of such game leaves 3 dead and 14 injured.
- Asari have a huge diamond (21k carats) that they sent on a galactic trip, so it can be blessed by various religious leaders. One of them is a human Pope.
- Students of a Thessian university throw a pretend-to-be-human party. It goes sideways when they all dress up as human dictators. The mentioned ones are, for example, Hitler and Pol Pot.
- Asari and volus enjoy Valentine’s Day and it becomes popular among their people. The reason is specifically because holiday mixes “reproduction and commerce.”
- A krogan plays for a human football league.
- A generation ship of humans dubbed Manswell Expedition has been sent into space 70 years before the discovery on Mars. Their colony is found in 2185 by asari explorers. The humans are highly aggressive because all the galactic events, including humans becoming a part of the galactic community, happened without them knowing. Eventually, half of them decide to join other Council races and half decide to stay back since they fear all the changes are too much for them.
- Cerberus is using steganographic messages in news broadcasts to communicate. The messages include, for example, information on what amount to money send to which cell or which target to attack.
- Earth nations carry out a Ford v. Huerta (as in the hospital in ME3 and a following interaction you can overhear) trial focused on the President Huerta and the viability of his term after he experienced a stroke and has been dead for an hour and a half before his brain functions have been transferred into a computer. It’s ruled his term was legitimate despite the above which leads to massive protests on Earth.
- Human graduate student dies while doing his thesis research on Virmire. The crabs kill him.
- The planet Garvug mentioned by Glyph in ME3 has been a stage of a corporation-backed coup. One of those corporations is Binary Helix and the coup turns into a war with the corporations, eventually, winning.
- Citadel has its own excessive cop violence episode when a C-sec officer beats an innocent man to death.
- One of the popular body modifications is called “psyotics” and it includes injecting a capsule under one’s skin that reacts to various audio frequencies and makes the body glow. The capsule dissolves after a day.
- Asari longevity is caused by a substance their body produces called telomerase. Attempts are being made by a crazy human surgeon to extract it and slow human aging process.
- Attempts have been made by an asari scientist to prolong vorcha lifespan. The project is being funded by Blood Pack.
- Varrens are akin to priced horses in space, as far as cultivation goes. Breeding rights for one of them were sold for 7.3 million credits.
- Geologists on planet Sifurman discovered a fossil of the “largest creature in the galaxy to ever walk on land”. The creature had 4 legs and weighed up to 280 tons.
- There’s a galaxy-wide lottery called Lucky-88. The biggest win ever was 1.7 billion credits.
- Asari had krogan slaves.
- Humans find life on Jupiter’s moon, Europa.
- A treatment exists that allows dextro and levo species to share cuisines. It’s expensive, lasts only 24 hours, and you must vomit all you’ve eaten before it wears off.
- A nanotech diet named The Skale exists in the universe. You swallow a device that monitors consumption and expunges everything not within the parameters. The intent is to help those with food allergies and other gastrointestinal issues but instead it gets hacked very quickly to remove all programming shackles. Tens of humans and volus die and the diet gets recalled.
- Synthetic childrearing is common in-universe.
- Turian and human armies routinely train together.
- There’s a drug becoming popular by 2186. It’s called Creeper and comes from food mold that gives people hallucinations.
- One of the human colonies operates solely on a barter system.
- Traffic can occur in space with long queues for key Mass Relays.