20 0 5Unmissable, as this is for story progression in memory 2 of the Lost Archive DLC.Simply complete this memory to unlock the achievement, you really cannot miss it.Showing most recent comments. View all comments. The Lost Archive DLC is accessed through the initial main menu for the game. There are options for "Story Mode", "Multiplayer", and "The Lost Archive".Posted by J Pinder on 29 Feb 12 at 22:05 The entire main game Desmond sequence is like one huge ad convincing me to not buy the Lost Archive DLC. Plus in the back-compat One version, most of the walls and floors are missing. I had to use a video guide to show me where the surfaces were.Posted by Gilbert Prime on 16 Oct 20 at 21:49 ^ Gilbert Prime exactly, still to this day in 2022 I had this problem and my achievements aren't showing up.Posted by DeadlyCarpet#245 on 09 Oct at 05:15 Leave a comment