Half Life: the Resonance Cascade from 3 points of view
The beginning of the Black Mesa incident from Half-Life from three perspectives:
Gordon Freeman from vanilla Half-Life,
Barney Calhoun from Half-Life: Blue Shift,
and the unnamed scientist from the Half-Life fan mod called Half-Life: Echoes.
Music tracks (in order):
Black Mesa Blue Shift ost: Introduction I
Half Life ost: Vague Voices
Half Life ost: Vague Voices remix (slowed and reverbed)
Black Mesa ost: Inbound I
Black Mesa ost: Inbound II
Black Mesa ost: Inbound III
Half Life 2 ost: Probably Not a Problem
Portal ost: Procedural Jiggle-Bone