So the deimos were added into the simulation by Ryoko because she hated humanity and wanted it to suffer, sure whatever that's fine. But she wasnt a coder at all, so she just copied the code over from the video game and let it run. I'm willing to accept that too. But why then, do the Deimos reference being created by Shikishima industries, and are they all terraforming machines instead of just random kaijus like they would be if they werent modified from that video game code at all? Did I miss this because otherwise it feels like two separate plot points kinda got meshed together there
Ryoko wasn't the one that made the Deimos Code, Okino was, because he found that code and it already worked for what he wanted so he didn't have to invent new code. He designed the actual terraforming robots that went ahead of the DNA/cloning ship to terraform the planets that they were heading out to. All Ryoko did was cause the code to implant in the 15 to activate the factories to mass produce those inside the simulation.