After watching the 3 minute Skyrim parody introduction (without pressing
to skip) you will gain
Simply head over to the tower press
to synchronise (assassins creed reference) Then head through the portal/door.
After the short segway move a couple steps forward and stand on the triangular shape base & another quick clip happens, after that move forward following the red carpet. Press
couple of times to jump over the rocks before seeing a large door with multiple chains across. Head to the circle with purple flames press
another clip ensures before unlocking this achievement.