Key Takeaways
Erebus is a Phantom Liberty Iconic Power SMG built around a conditional Blackwall effect rather than a conventional damage-only modifier.
Blackwall-infused Power SMG
Its defining mechanic gives fired rounds a chance to apply a Blackwall-related effect to enemies, making Erebus distinct from ordinary Power SMGs and tying its identity to Cyberpunk 2077’s Blackwall technology.
Conditional execution pressure
The weapon is particularly suited to finishing weakened enemies: its special effect becomes more relevant against targets at low health, so its value depends on target state rather than applying uniformly to every shot.
Phantom Liberty and mission-gated
Erebus requires the Phantom Liberty expansion and is connected to the Somewhat Damaged mission. Its acquisition is route-dependent and can be missed, so the weapon should be secured during that mission rather than treated as a routine vendor pickup.
Strong for sustained SMG combat
As a Power SMG, Erebus supports close-to-mid-range automatic fire while adding a distinctive supernatural-tech effect. It is most compelling for builds that already invest in SMG handling and sustained gunplay.
Not a universal damage upgrade
Its signature benefit is conditional, so Erebus does not replace every high-tier SMG in every encounter. Weapons with more consistently useful modifiers may be preferable when enemies are not in the health range that activates its advantage.
Iconic tier progression
Erebus follows the post-2.0 Iconic weapon progression model: its capabilities are tied to its current tier, and later improvement uses the game’s Iconic upgrade materials rather than making its initial version permanently final.
Compared with standard Power SMGs
Where a conventional Power SMG mainly offers predictable automatic fire and ricochet-oriented behavior, Erebus trades some of that simplicity for its Blackwall-linked, low-health-focused effect.
Overview
Erebus is an Iconic Smart submachine gun from Cyberpunk 2077: Phantom Liberty. Its defining feature is a health-sensitive chance to upload the Blackwall Gateway quickhack, giving the weapon a distinct finisher-oriented role among Smart firearms.
Erebus is a late-Phantom Liberty weapon built around the setting’s most dangerous piece of network technology rather than a conventional ballistic gimmick. As an Iconic Smart submachine gun, it combines automated targeting with a unique Blackwall effect: shots can upload the Blackwall Gateway quickhack to an enemy, and the chance of that effect increases as the target’s health falls. The weapon therefore becomes more distinctive during the final stage of an engagement, rather than relying only on its ordinary firearm profile.
That behaviour gives Erebus a role between a general-purpose Smart weapon and a specialized execution tool. It can participate in routine firefights, but its defining value appears when enemies have already been weakened. The Blackwall effect makes finishing pressure part of the weapon’s identity, so it is especially relevant to players who enjoy Smart Weapons and want their firearm to contribute a supernatural or netrunning-themed threat without manually applying every effect through quickhacks.
Erebus differs from ordinary Smart submachine guns because its technology is not limited to projectile tracking. The Blackwall Gateway interaction is an Iconic weapon modifier, not a universal property of the Smart weapon category, and it should be evaluated separately from the general benefits and limitations of Smart targeting. That distinction also keeps Erebus from being treated as a simple upgrade over every other Smart firearm: its appeal depends on whether the player values its conditional finishing effect and Phantom Liberty theme.
The weapon belongs to Phantom Liberty’s later progression and is consequently more relevant to an established character than to a new Night City build. Its place in the expansion’s content also gives it a stronger identity than a randomly tiered vendor weapon, while the exact damage and handling profile remains dependent on the post-2.0 weapon system’s tier context. The overview case for Erebus is therefore its combination of Smart targeting, Iconic status, and Blackwall-based behaviour—not an unsupported claim that it is universally the strongest submachine gun.
Statistics
| Field | Value |
|---|---|
| Class | Submachine Gun |
| Subtype | Submachine Gun |
| Technology | Smart |
| Ammo | Handgun Ammo |
| Stat Scaling | Tier-dependent |
| Iconic | Yes |
| Field | Value |
|---|---|
| Content Scope | Phantom Liberty |
Figures verified against Consolidated Game Weapons Database.
Compared to similar submachine guns
| Attribute |  Erebus | ||||
|---|---|---|---|---|---|
| Class | Submachine Gun | Submachine Gun | Submachine Gun | Submachine Gun | Submachine Gun |
| Technology | Smart | Power | Smart | Smart | Power |
| Ammo | Handgun Ammo | Handgun Ammo | Handgun Ammo | Handgun Ammo | Handgun Ammo |
| Iconic | Yes | — | — | — | — |
How to Obtain
- Cyberpunk 2077: Phantom Liberty.
- Access to the Reed route and the mission Somewhat Damaged.
- The Erebus crafting specification and Behavioral System Component must both be obtained during the Cynosure mission sequence.
- The acquisition is tied to the Somewhat Damaged mission and should be treated as missable if its optional Cynosure loot is left behind.
- 01Own the Phantom Liberty expansion and follow the Reed-aligned storyline through the mission Somewhat Damaged. Erebus is tied to this mission's Cynosure facility and is not obtained through a standard weapon vendor or an ordinary world pickup.
- 02While exploring Cynosure during Somewhat Damaged, search the restricted facility for the Erebus crafting specification before leaving the mission area. The specification is found during this mission rather than awarded automatically at the start of the quest, so do not finish the mission without checking its optional rooms and terminals.
- 03Collect the Behavioral System Component during the Cynosure sequence. This unique component is required alongside the Erebus specification to produce the weapon, and the mission provides the relevant opportunity before its conclusion.
- 04After acquiring both the specification and the Behavioral System Component, use the Iconic crafting interface to create Erebus. The weapon is therefore a Phantom Liberty crafting reward, not a guaranteed completed-gun reward from a boss or vendor.
Availability
Cyberpunk 2077 base game without Phantom Liberty
Erebus is a Phantom Liberty weapon and is not part of the base-game weapon pool.
- Requires
- Phantom Liberty is required.
Phantom Liberty — Somewhat Damaged branch
The weapon is missable if the relevant Phantom Liberty branch or mission opportunity is not completed. It is not presented as a standard permanent vendor-stock item, so no universal purchase price applies.
- Requires
- Phantom Liberty ownership and progression to the Somewhat Damaged mission on the branch that leads into Cynosure.
Mechanics and Handling
Erebus is a Smart submachine gun whose identity comes from its Blackwall-based firing effect rather than an unusual firing mode. It behaves as an automatic firearm, while Smart targeting guides its projectiles toward locked targets. The weapon therefore rewards maintaining target lock and keeping enemies within practical Smart-weapon engagement conditions rather than relying solely on conventional point shooting.
Its special effect is conditional on the target's health. Against sufficiently weakened enemies, Erebus can upload the quickhack through its shots. This effect can finish the target with a severe Blackwall attack instead of requiring the rest of the magazine to be spent on ordinary weapon damage. The trigger is not a universal instant-kill effect: enemies must first meet the weapon's low-health condition, so Erebus is more reliable as an execution tool during an ongoing fight than as an opening-shot weapon against full-health targets.
Smart targeting and automatic fire
Erebus uses the Smart weapon system, so its handling is built around target acquisition and guided rounds. Once a target is properly tracked, the weapon can continue applying automatic fire without demanding the same degree of manual aim as a conventional submachine gun. This does not remove the need to manage positioning: target lock, line of sight, enemy movement and the weapon's practical engagement distance still determine how consistently its shots connect.
As with other automatic SMGs, sustained fire is most useful when the shooter controls the engagement rather than holding the trigger indiscriminately. Erebus's value is concentrated in repeatedly landing shots on a target until the Blackwall condition becomes relevant. It is less distinctive when used as a simple spray weapon against enemies that remain at full health or outside effective Smart-weapon conditions.
Blackwall Gateway execution effect
The weapon's defining mechanic is its chance to upload the Blackwall Gateway quickhack to an enemy who has been reduced to low health. When the effect activates, it provides a powerful finishing response that can abruptly remove the affected target from the encounter. This makes Erebus especially dangerous during the cleanup phase of a firefight, after other attacks, hacks or allies have already weakened opponents.
The effect should not be treated as a replacement for ordinary gunplay. It is conditional rather than permanently active, and its activation does not mean every shot against every enemy produces a Blackwall result. Players get the most from Erebus by focusing fire on weakened targets and moving between eligible enemies instead of expecting the weapon to bypass the entire health bar of a fresh target.
Role in a fight
Erebus fits a approach that combines automatic pressure with opportunistic executions. Its strongest sequence is to establish a lock, damage a target through normal fire, and continue applying pressure while watching for the low-health Blackwall interaction. The weapon can then help shorten the dangerous portion of an encounter without requiring a separate manual quickhack upload.
Because the Blackwall effect is tied to target condition, Erebus does not eliminate the usual trade-offs of an SMG. It still asks the player to fight at a range where automatic fire and Smart targeting remain practical, and it does not turn every encounter into a guaranteed chain of executions. Its special behaviour is most meaningful when the build and combat situation already support sustained firearm pressure.
Upgrades and Variants
Strengths, Weaknesses and Best Uses
Strengths
- Its unique Blackwall effect gives Erebus a finisher role: the effect is more threatening against enemies that have already lost health, so sustained fire can turn weakened targets into immediate priorities.
- As an automatic SMG, Erebus can apply repeated hit checks during a short burst rather than depending on one carefully timed shot. That makes its signature effect practical while pressuring enemies at close to medium range.
- Its Iconic weapon effect gives an SMG-focused loadout a way to add lethal cyberware-themed pressure without replacing the weapon's ordinary firearm role.
- Erebus is particularly valuable when a fight contains several damaged targets, because its Blackwall behavior can create momentum after the player has already established control of the encounter.
Weaknesses
- The Blackwall effect is conditional rather than a guaranteed instant defeat. Erebus should not be treated as a replacement for reliable damage against a full-health target or a resistant enemy.
- Its strongest payoff depends on first weakening opponents, which makes the weapon less distinctive at the start of an encounter and reduces the value of chasing the special effect against isolated, durable targets.
- Automatic SMG fire consumes ammunition quickly and is less suited to deliberate long-range precision than a rifle or precision weapon. The player still needs ordinary positioning and target selection when the Iconic effect does not trigger.
- Its specialised effect is most useful when the player can keep pressure on several vulnerable enemies; it offers less decision value for a stealth or single-shot playstyle built around minimal ammunition expenditure.
Best uses
- Use Erebus as a close- to medium-range finisher after another weapon, quickhack, or ability has reduced enemies to vulnerable health levels.
- Bring it into dense combat encounters where repeated automatic hits can pressure several weakened targets and give the Blackwall effect multiple opportunities to matter.
- Pair it with an SMG-oriented build that already supports sustained automatic fire, while treating the Blackwall effect as a conditional payoff rather than the entire damage plan.
- Choose another weapon when the encounter primarily rewards long-range precision, ammunition conservation, or dependable damage without relying on a conditional Iconic effect.
Compared With Similar Weapons
| Attribute | Erebus |  Yinglong |  Pizdets |  Raiju |
|---|---|---|---|---|
| Technology | Its unique effect can upload the Blackwall Gateway quickhack to enemies, with the effect becoming more threatening against weakened targets. | Its iconic effect can trigger an EMP effect on impact, giving it an electronics-disruption role instead of Erebus's Blackwall behavior. | Rewards sustained fire by improving its combat performance while the weapon continues firing, then loses that advantage when the firing sequence ends. | Uses the Tech weapon system rather than Smart targeting, making charge and penetration mechanics more relevant to its role. |
| Distinguishing behavior | Best for a Smart Weapons build that wants weapon fire to add a distinctive Blackwall effect; its value is tied to that special behavior rather than being a conventional SMG comparison. | A practical alternative for players who prefer area disruption and cyberware interference over Erebus's health-dependent offensive effect. | Better suited to maintaining pressure on a target; Erebus is the more distinctive choice when its Blackwall effect is the reason for using the weapon. | A realistic alternative for a Tech-focused build or players who want a different firing system; it does not reproduce Erebus's Smart targeting or Blackwall effect. |
| Best fit and trade-off | — | — | — | — |
Used In
- Somewhat DamagedErebus is tied to this Phantom Liberty main mission. Its crafting-spec acquisition and the component needed to produce the weapon are associated with the Cynosure sequence.
- CynosureThe restricted facility is the location associated with Erebus's acquisition during Somewhat Damaged.
- Behavioral System ComponentThis unique component is required for crafting Erebus after obtaining its crafting specification during the Cynosure sequence.
Lore and Design
Cynosure and the Blackwall
Erebus is thematically tied to the Cynosure project and the Blackwall rather than being presented as an ordinary military firearm. Its story context places it among the dangerous technologies developed around attempts to contain or exploit entities beyond the Blackwall. The weapon therefore represents the boundary between conventional hardware and hostile artificial intelligence, reinforcing Phantom Liberty’s focus on compromised systems and the consequences of treating the Blackwall as a usable resource.
The weapon’s significance is primarily contextual: Erebus connects the player’s equipment to the larger Cynosure incident and its hidden research. Its name and presentation evoke the underworld imagery associated with crossing a forbidden boundary, but that symbolism should be treated as interpretation rather than a stated developer explanation. The game does not, in the available evidence for this page, provide a documented real-world model, design inspiration, or creator commentary that would support a stronger claim about its origins.
Trivia
- Erebus is one of the Phantom Liberty-era weapons associated with the Blackwall. Its thematic counterpart is the Militech Canto Mk.6 cyberdeck, which channels the same dangerous network mythology through a different equipment slot.
- The name “Erebus” comes from Greek mythology, where Erebos personifies primordial darkness. That reference fits the weapon’s Blackwall theme, but the name alone does not establish a direct canonical connection between the mythological figure and Cyberpunk 2077’s setting.
- Erebus is notable for presenting Blackwall activity as a firearm effect rather than as a quickhack or cyberdeck feature. The weapon’s distinctive combat behavior is therefore part of its identity, not merely visual naming or an alternate weapon finish.
