LEGO The Lord of the Rings
48 Achievements
30-35h
One does not simply...
Walk into Mordor.
3.5%
How to unlock the One does not simply... achievement in LEGO The Lord of the Rings - Definitive Guide
The achievement should unlock once you cross the bridge next to Cirith Ungol (It is possible for the achievement to pop by going from mount doom and crossing over the
Cirith Ungol bridge and doing it that way)
Video attached for a visual guide by HappyThumbsGaming.
This trophy is very simple. Just fast travel to the Black Gate and walk through the gate into Mordor with any character. Walk towards Mount Doom and this trophy will unlock.
If for some reason this doesn't work, you can try the alternative route. That is, Fast Travel to Minas Morgul and walk through Shelob's Lair and Cirith Ungol into Mordor.
This achievement definitely gets my vote for best achievement of the year, as it'll amuse fans of the Lord of the Rings series and leave some people scratching their heads when it unlocks.
Anyway, onto unlocking the achievement; this is an easy one. To nab this achievement, walk into Cirith Ungol in Mordor with any character. Fast travel via Map Stone and walk up the path towards the tower and the achievement will unlock. It's also possible to fast travel to Cirith Ungol, walk a little bit away from the Map Stone, and walk back to it to pop the achievement.
You'll need to be part way into the third book/film to access this area, and it's always just an option just to wait until you've beaten the story mode and can go anywhere.