In the locker room in the beginning of the game, the names on the lockers are the last names of the Half-Life design team. You'll find (Dario) Casali, (Greg) Coomer, (Ken) Birdwell, (Chuck) Jones, (Mona Lisa) Guthrie, (Douglas R.) Wood, (Steve) Bond, (T.K.) Backman, (Karen) Laur, (Dave) Riller, (Harry E.) Teasley, (Kelly) Bailey, (Brett and/or Erik) Johnson, (Jay) Stelly and (Marc) Laidlaw. The final locker, labeled Freeman, is of course the player's locker.