Spoilers!
On TJ route we got the confirmation that Chase killed Sidney, but why? On that route it looks like Chase is super protective with TJ and that's why he just killed Flynn when there was 'danger' (and i bet he would've killed even the Deer guy if he could), but when they were kids he didnt seem to be so obsessed with TJ (i believe it's because of Echo that he was acting that weird) and he doesn't seem to hate Sidney that much, so why did he actually killed him? And who tf did the whole treasure hunt? Was Socket Monster (Flynn)?, it couldn't be anyone on the group but Jenna who knew about the hanging man but only TJ knows what happened on the lake.