Strange Events and Unknown Dangers

A failed lab experiment to make a portal to other dimensions brought creatures from those dimensions into ours. Three years later 70% of the population on Earth was destroyed, the last 30% doesn't know anything about what was going on and hadn't received any news about it. But when they do find out, it may already be too late.

(This story is based off of Rain World and may contain spoilers about the game, if you do not want any spoilers don't read this story.)
(Some of the creatures in the story are my own and are not from Rain World so please don't use them or steal them unless you have my permission.)