Level select:
Highlight the 'Extras' option at the main menu, then press Left 11 times, Right 7 times, then B to unlock all the levels in Single Mission Replay mode.
Thanks to Revolution reader urungus!
The sequel to the award winning Hellblade: Senua’s Sacrifice, Senua returns in a brutal journey of survival through the myth and torment of Viking Iceland. Intent on saving those who have fallen victim to the horrors of tyranny, Senua faces a battle of overcoming the darkness within and without.