I interpreted the question to include mobile devices and answered Tetris with high confidence.
It would be interesting to see the results of the question if we accepted either Tetris or Minecraft as the correct answer, since both are correct depending on whether or not “computer” was meant to mean “IBM PC Compatible” or “video game playing platform”
Wouldn’t it be more accurate to state that R represents an enduring multi-system technological civilization and not mere colonial presence?
I don’t think we can arguably claim that space in our stellar neighborhood has never been colonized, just that it does not appear to be currently