Challenge 16

Invincible Fallout Crossover Challenge

After spending a few centuries in a vault, Mark, Atom Eve and the descendants of fellow heroes decided to leave their vault and explore the wasteland and carve out a slice of paradise for themselves.

Rules:

Hostile environment and governments

Challenge 17

Invincible Starship Troopers Crossover Challenge

The arachnid menace has declared a genocidal war against mankind. Luckily for humanity there are super powered individuals standing between them and the total extinction of the human race.

Rules:

Has the rare super powered bug

Viltrimites have their attention divided between fighting the arachnids and conquering the cosmos

Mark is loyal to humanity

Humanity doesn't have a fascist government

Multiple alien races

Challenge 18

Invincible Big Hero 6 Crossover Challenge

There is a new hero team in San Fransokyo and Cecil gets them a new hero tutor, Mark.

Rules:

Clueless teacher Mark

True friends

Challenge 19

Invincible Resident Evil Crossover Challenge

Umbrella officially collapsed after the T-Virus ravaged Raccoon City. Unofficially their scientists who created the virus continued their research in secret, until the virus rears its ugly head again.

Rules:

Has infected Supers

Takes place after Omni-Man left Earth

Challenge 20

Invincible Teenage Mutant Ninja Turtles Crossover Challenge

At a young age Mark witnessed his dad killing his mom, in fear Mark ran away and found himself hiding in the sewers of New York and found by young 4 anthroportic turtles. So they took him in and their rat sensei trained in the art of ninjutsu. Now years later his powers kicked in and his past decided to return.

Rules:

Experienced Mark

Poor relationship between Nolan and Mark

Challenge 21

Invincible Gravity Falls Crossover Challenge

Dipper and Mabel may seem like your typical preteens but they have a secret, they are the twin children of Omni-Man.

Rules:

They may have powers but they don't have them when they get to gravity falls

Starts before the Invincible series

Challenge 22

Invincible One Piece Crossover Challenge

After a battle with Angstrom Levy, Mark winds up in the world of One Piece and due to a series of misunderstandings, Mark has to team up with the Straw Hat Pirates to learn about the new world he is in and find a way home.

Rules:

Mark joins Straw Hats before or during the events of Enes Lobby

Mark faces various challenges in the One Piece world

Challenge 23

Invincible Alien/Predator Crossover Challenge

Shortly after Omni-Man left Earth, leaving a battered and bruised Mark, the GDA managed to find an ancient spaceship hidden on Earth. So Cecil sent both agents and scientists to figure out its secrets and doing so let the Xenomorphs out of the ship.

Rules:

The Xenomorphs give the GDA and the Guardians a lot of trouble

Xenomorphs blood can hurt Mark

Yautja's (Predator) may appear

Challenge 24

Invincible Big Bang Theory Crossover Challenge

After finishing college, Mark manages to get a job at the California Institute of Technology. Can Mark keep his civilian and heroic lives separate from the others at his job, and can he keep up with the antics of the scientists.

Rules:

The characters of the Big Bang theory are suspicious of Mark after his frequent disappearance while on the job

Mark is or will live in the same complex as Sheldon

Challenge 25

Invincible RWBY Crossover Challenge

The Grimm has somehow managed to find their way to Earth and spread across the globe in a short amount of time. How can the GDA and various heroes react to the new threat?

Rules:

Grimm causes trouble around the globe

Post Omni-Man left Earth