Being an FPS/RPG game DLC could feature the same levels maps with procedural generation to create a smaller extended map to utilise different genres in, such as Stealth or Platformer. A full squad could play a team based infiltration or parkour through the level to get to extraction. Single player driven short stories could feature hacker antics in a sci fi setting or have the child characters from the Ark trying to get to other colonists.
Thoughts?
Not a bad idea - also:
Stop using that word (platformer!) - it's a JUMP-AND-RUN
(at least that's what they called it in the 90's and early 2000's)
BUT:
No CHILDREN (damned, who would put children on such a ship? - Select the damned best people you can get (young, intelligent, healthy, attractive (as an indicator of good genes!), genetically sound (check for hereditary/genetical illnesses and defects!), well trained etc.) and who'd be able to contribute the most to such an expedition (children don't contribute anything, they only take up space and consume ressources...also: Children happen naturally - later, when there's at least basic infrastructure in place!) and take along fertilized (and genetically screened - defects, illnesses, but also potential future health and intelligence etc. (if it were me? I'd make a lot of "Mirandas" and send them...just with both genders and different looks, so that it's not like sending the Star Wars Clone-Army!)...sending anybody who you can grab is a bad idea if the survival of the species of the whole galaxy is in jeopardy! This would not give the colony the best possible start!) embryos that can later be incubated (they've got the technology - it was how GRUNT was made, not to mention Miranda!) to increase your population very very fast!)