So at the conclusion of the game I'm looking back at my listing of the Walking dead on steam, except hang about; 98% achievements 39/40 done.
"What Remains" is locked: complete chapter 8 of episode 5
Cue loading the game back up and trying to continue, alas last chapter in the listing is 7: "Goodbye"
Tin foil hat conspiracies? My game just glitched and the epilogue was meant to be the final "chapter"? Hmmm..