The pseudonym is the game acknowledging that Higgs has been present throughout — not just as an antagonist waiting at the end but as a participant in Sam's journey, feeding him information, shaping his path, using the network Sam was building to ensure that Sam arrived at the beach prepared to play the role Higgs needs him to play. Peter Englert as a name is the fiction that the manipulation required, the anonymous correspondent who seemed to be helping.

The massive BT boss is the beach expressing itself at maximum scale, the accumulated dead becoming something that requires everything Sam has to address. The scale of the fight is the game's measure of how far Sam has come — the porter who was carrying Smart Drugs to Central Knot City in the prologue is now addressing a creature the size of a city block that emerged from the space between the living and the dead. The carrying prepared him for this. Nothing else could have.