Hello, just on my way of completing every achievement, and accidentally find something...weird during the true ending final boss fight.
It seems that in co-op game players can abuse the hardmode mechanic that Zhamla always tries to steal players' barrier first, thus making one player continuously giving barrier to four players while the other three players attack Zhamla like hitting a train dummy(because he just keep stealing barriers and doing nothing else) possible...well I guess this can be fixed by making Zhamla invulnerable during the stealing process probably?
By the way we are playing 1.0 version