The Whole Gang's Here

The Whole Gang's Here is a trophy/achievement in Fallout: New Vegas.

Requirements
Successfully convince all of the companions to join you over the course of a single game. All companions do not have to be in your party to obtain this achievement/trophy.

The eight companions you need for this achievement are: Arcade Gannon, Craig Boone, ED-E, Lily Bowen, Raul Alfonso Tejada, Rex, Rose of Sharon Cassidy, and Veronica Santangelo.

Bugs

 * The achievement may glitch, to where you will not unlock it after you find them all. The easiest way to attempt to fix this is to have them all go to the same place (Lucky 38 presidental suite recommended) and just constantly asking them to follow you, then return to Lucky 38 again.
 * Despite receiving the achievement, it may not show up in Steam.
 * This achievement may on occasion bug and instead of hiring all of the companions, all you need to do is hire 8 companions; even hiring the same companion in 8 playthroughs qualifies for this achievement.