Alex Mauer issued a DMCA strike against RCRU which unfortunately succeeded. RCRU has now been removed from sale from Steam. I don't know when or if she will issue a DCMA strike here - but be aware this game is in jeopardy of being removed while this entire issue is occuring.
It needs to be said that this game has not been removed per sé, it has been hidden due to a pending DMCA claim and if this one fails she'll be steam banned for good and the game will resurface, and RCRU devs can make lost sales count in a court. (not a whole that will fix, but still)
Overall, RCRU will need to reveal the freelance contract or email agreement and give it to steam in the counter claim, and maybe to Sid, for defense in courts later, but this entire DMCA system is just completely broken, and it's good a mentally broken down maniac shows this that clearly.
Yes, everyone with a mouse and a keyboard can DMCA claim anything... it's a totally broken system. Though if you do it on Steam, you are in for a world of hurt afterwards, Steam while it has to comply on the surface, will steam ban someone for life if they abuse this system.
Still, it's pretty clear nothing anyone says will get through to Alex Mauers mental disorder, and so all we can do here is heat and butter the popcorn and weather the storm ;P