Death Streaks are the opposite of Killstreaks, they are meant for players who are constantly getting killed. Once you've died enough times, without any kills, your Death Streak will become active.
# 4 Deaths
Copycat
Description: Allows you to steal your killer's class. This can give a sneak-peak at the more advanced weapons, attachments and perks, before you've unlocked them. Note: You still need to unlock the everything on your own.
Unlocked at level 4.
# 3 Deaths
Painkiller
Description: Works almost like the Juggernaut perk from Call of Duty 4. After you respawn, this gives you twice the amount health for 10 seconds. This can prevent most one-hit kills.
Unlocked at level 6.
# 4 Deaths
Martyrdom
Description: Drop a live grenade just after dying. Like in Call of Duty 4, this is useful in rooms where it's difficult for the enemy to run away from the explosion.
After you kill someone and you hear a grenade drop, RUN!
Unlocked at level 27.
# 4 Deaths
Final Stand
Description: Just like the Last Stand perk, but with more improvements. Basically this allows you to survive a normal death. You can crawl around on the ground and use your primary weapon and equipment.
You have a little more health than in Last Stand and if you survive long enough, you can get back up and continue to fight normally. This does not reset your ongoing killstreak.
Unlocked at level 39.
