"e3_end" is a Half-Life 2 Beta map, reworked for Missing Information. This is (almost) the same map as in the Half-Life 2 "Psyche" trailer, in 2003. Several strange images and inscriptions follow one another, all accompanied by strange sounds. The camera stops on Odell (instead of the G-Man), who addresses the player. And then, fade to black, and the Half-Life 2 logo appears, spinning, to the sound of Pulse Phase.
3