I recently redownloaded mech arena a few days ago and I wanted the arachnos the second I saw it. I looked it https://nox.tips/ up and apparently you're supposed to have challenges or something to get it. My brother just got the https://xender.vip/  game for the first time a day or two ago and he had the challenges but I didn't. I don't know why or if I'll even be able to get it anymore but any help is welcome.