After trying to get the 100% achievement on 3 separate GTA games (GTA 3, 4 and 5) I've found out the hard way that Rockstar cannot be trusted to make a game without bugs that lock you out of 100% completion.
They even released the next gen ports of gta v with these same bugs in tact that stop you getting 100% or getting the platinum trophy.
So with RDR2 should they make it possible to get 102% so if 1 or 2 things go wrong you'd still get the 100% achievement?