i dont know if the red tier are bugging or anything , but i already found a red tier, in a formula , We need to add red tier, or just remove it from the server?
if add red tier = rarity 9999 . they are also place holder for another rarity ^^ (not meant be in game yet)
First, it got already removed. Second, it's easy to abuse the red items, i.e setting the rarity up to maybe 30?, which will give you a bonus (on your weapon) dmg of 1-2k? As grey already mentioned in a way i understood, this game is still in alpha, and there may be added more raritys. So don't bother.
While wearing a red item you cannot join the game, this makes it somewhat more fair for the players who don't have red gear. This also stop players from hacking in full red gear. Which in turn would likely be impossible to legally get, having heard the drop potential is like winning a mega lottery. (I've gotten a Red formula drop myself, it wasn't even any good, and couldn't be adapted.)