Corporal Macey is a Ranger seen in the level "S.S.D.D." playing basketball with Cpl. Keating. Macey can later be seen in the level "Of Their Own Accord", shown to have been promoted to Sergeant. He is also standing over another Ranger working on a computer while Keating types on a computer nearby.
If the player stands on the makeshift basketball court in the level "S.S.D.D." long enough, one of the two Rangers voiced by Robert Bowling will say, "Get off the court dude." If the player continues to stand there he will say, "Come on man, wait your turn." and eventually, "Allen, what the hell?"
When Macey and Keating are playing basketball, Keating scores more points.
It appears that Keating and Macey are friends, as they are always seen together by the player.
It is possible to kill Macey. On the level "Of Their Own Accord", the player should plant a claymore in front of Macey and shoot it, and he will die. His body may vanish.