"Nobody knows if Lucifer is a machine, a human or a ghost from hell. The fire of Lucifer can kill whole hordes of infected. It can not attack through walls but is immune to fire."
Lucifers are very short ranged and slow infantry units armed with flamethrowers, designed to clear large group of common infected quickly. The flamethrower allows them to deal sustained damage in a small cone shaped area in front of them, allowing them to deal with large numbers of Infected with small health pools simultaneously. While starting the attack takes some time, Lucifers have no reload animation and can switch between enemies instantly, wasting no time between attacks.
The Lucifer is one of four specialised units requiring Oil that can only be recruited from an Engineering Center. The other three being the Thanatos, the Titan and the Mutant. It is also the only unit of the four that can be recruited without any additional research, making it more easily accessible.
Lucifers have an impressive 500 HP, which makes them capable of surviving at least 4 hits from an Infected Giant, not to mention lesser infected. Another notable bonus of Lucifers is that they regenerate their health at the rate of 40 HP/sec, making them usable faster after taking heavy damage.
Lucifers are surprisingly quiet, making only 10 noise per attack and being able to hit multiple infected each time they fire, and killing most of infected before they can make any noise. Their relatively large collision box also prevents them from stacking too much Noise on the same square.
Lucifers can pick up the barrels that are sometimes scattered around the map. A Lucifer that dies while carrying one of these barrels explodes, taking many nearby enemies with him.
Unfortunately Lucifers suffer from a number of disadvantages that make them a poor fit for defensive roles:

| Tier ⇅ | Slow ⇅ | Fast ⇅ | Exec ⇅ | Spec ⇅ | Chubby ⇅ | Behemoth(800%) ⇅ | Giant(800%) ⇅ |
|---|---|---|---|---|---|---|---|
| Base | 2 | 2 | 4 | 6 | 30 | 371 | 1191 |
When trained:
When selected:
When moving:
When attacking:
When dying:
When deserting:
Unused: