Quick Answer
No, you can't get a dog in MW4 DMZ, and level rewards don't include one. Rex is only your companion in the Breaking New Ground tutorial, where you head into enemy territory to retrieve a black box together. Your soldier is later captured and killed, so the promised return for Rex never happens.
Dog, Dog Companion, and Rex refer to the same dog you encounter during the DMZ tutorial.
How does the dog work in DMZ?
Rex accompanies you during Breaking New Ground, the DMZ tutorial mission, as you go into enemy territory to retrieve a black box.
Rex runs ahead of you on the trail after you land.
Shown at 06:00 in MrDalekJD’s video.You can pet Rex after dropping in. The objective then switches to Follow Rex, and he leads you toward the wreckage.
The Follow Rex objective, with Rex on the path ahead.
Shown at 06:16 in MrDalekJD’s video.As of October 21, 2026, you cannot own a dog, and the level rewards do not include one.
Rex's role here is as your tutorial companion. For your own operator selection, see MW4 DMZ how to change operator.
What happens to the dog in MW4 DMZ?
Rex gets shot during an ambush, and you hide him with the intention of picking him up on the way back, but your soldier dies before returning.
Two North Korean soldiers ambush you during the black box operation. Rex kills both attackers, getting wounded in the process. You check on him and drag him into cover so you can retrieve him later.
That return never happens: your soldier is captured and shot in the head. Rex is left at the hiding spot.
Why is the DMZ dog called Rex or Dog Companion?
Rex is the dog's name; “dog” and “Dog Companion” describe the animal and his role beside you in the tutorial.
- Dog: what you first encounter in the opening mission.
- Dog Companion: his role accompanying your soldier on the black box operation.
- Rex: the name used when addressing him during the mission.
Once you've followed Rex's tutorial story, continue with MW4 DMZ story missions. If you're moving on to your first deployments, head to MW4 DMZ tips.