I think the Tetris game is supposed to be a border wall-builder. Thus having lines clear wouldn’t make much sense.

Depends on which world you end up on… because there are quite a few Space Marine legions you don’t want to be invaded by.

I think it’s a typo, intended to say “18-29”, in reference to the age range of the poll statistics of that group.

Not to mention that the nuclear fuel can be recycled, albeit with some loss, but (at least in the USA) you’re legally not allowed to do that.