Marina Asylum

Here. Welcome, criminal. You've been pulled out of your timeline for crimes you've committed. Nope, it doesn't matter if you were helping people or saving the world! Now you're here. Forever.

Tropes used in Marina Asylum include:

All Crimes Are Equal: According to the warden, shoplifting is as bad as genocide, and deserves a life sentence.
Alternate Self: Sometimes they meet here, such as Nunnally and her Nightmare of Nunnally counterpart.
Applied Phlebotinum: The dimensional stabilizer.
Arson, Murder, and Jaywalking: Some characters' crime lists read like this.
Back From the Dead: Hughes and Euphie, among others, due to the warden bringing people from different canonpoints.
Big Brother Instinct: Lelouch is probably the worst about this, but most of the older siblings have it.
Big Brother Worship: Akito, Rolo, Fletcher, and a few others suffer from this. Deconstructed in most cases, with fun results for all!
Can't Have Sex Ever: Sex is outlawed because Acumen doesn't want the criminals reproducing. And birth control is out of the question because the criminals shouldn't be having sex.
Children Are Innocent: Played with. Many of the inmates are minors, but children under thirteen are never arrested unless they've already committed heinous crimes.
Everything's Better With Dinosaurs: See the raptors. Even if they are no longer "real".
Fish Out of Temporal Water: Perhaps not directly due to taking place on another world, but a good portion of characters experience this considering the technologies available.
Jaywalking Will Ruin Your Life: Even just one crime is enough to get you sentenced to Marina for life.
Killed Off for Real: If you die in Marina, you die in real life. And you get a tombstone in the graveyard!
Life or Limb Decision : Played with by Lambdadelta, when realizing she is restrained by an ankle chain. She ropes Minako into cutting off her foot for her, though because she's an immortal of some sort, she just sews it back on once the chain is removed.
Luxury Prison Suite: Some of the inmates live in more fancier housing among the rest, those include Ciel's replica of his mansion and Lelouch's house.
Master Computer: Acumen, more or less. Sentience used to be one, but then it started caring about the inmates.
Might As Well Not Be in Prison At All: Many inmates' attitudes toward Marina's environs and lax rules.
Nerf: Character superpowers are usually nerfed.
Nice Job Breaking It, Hero: Lain when she tried to fix Sentience's programming to prevent All Crimes Are Equal. Instead, Sentience shut down and so did the life support for three days.
Penal Colony: More or less.
Roaring Rampage of Revenge: Dahlia Hawthorne did this after Russel killed her. You done good, Pearl.
Robot Maid: Some of the bots do menial labour like this.
Sibling Yin-Yang: The Elric and Tringham brothers and, to an extent, the Britannian royal family.
Sliding Scale of Law Enforcement: Justified by the Defense Force being unable to do anything unless muns actually communicate.
There Is No Higher Court: Subverted. Sentience's creators, and later Sentience itself, were all tried and sentenced for kidnapping the inmates.
Thirty Second Blackout: Averted. The blackout lasted two days and some change, and then still took some time to get everything up and running again.
Translator Microbes: The communicators act as these.
Translator Collar: The communicators also work as these, for the animal characters anyway.
Underwater City: Marina is one.
Viewer Gender Confusion: No one can decide on the correct pronoun for Sentience or Acumen.
Working On the Chain Gang: New inmates whose crimes involve some form of murder are often chained to iron balls for the first few days of their imprisonment and shepherded around doing menial labor. A minor example, since this menial labor involves gardening and doing laundry.

The players in this game provide examples of...

Eye Scream: Poor Keri.
Moe Moe: Misao!!!!!11
- haet.