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Megabuilding H4

Megabuilding H4 is the large quarantined residential tower in southern Arroyo, Santo Domingo.

Importancemajor

Key takeaways

  • H4 is in Arroyo, Santo Domingo, in the southern part of the sub-district, not in Heywood or Dogtown.
  • The tower is quarantined and cannot be entered during the playable 2077 setting Its interior is not an explorable megabuilding like H10.
  • The main game activity here is Over the Edge, added with the Edgerunners-related 1.6 update.
  • The quest begins with a braindance found in a nearby rubbish bin, beside a green Edgerunners symbol.
  • Completing the quest awards David’s Jacket, but the item is collected later at Dam Viewpoint, not inside H4.
  • H4’s wider lore differs by continuity The 2045 tabletop material describes a developing megabuilding with businesses and the Rat Kings, while the 2077 game presents it as a sealed, plague-affected structure.

About this guide

Scope: Cyberpunk 2077 base game, including post-launch Edgerunners content available in the base game. Continuity note: Megabuilding H4 also exists in Cyberpunk RED and Cyberpunk: Edgerunners, but its history, residents and internal businesses differ between those continuities. This guide separates them rather than treating every appearance as part of the 2077 game world. Research note: The exterior and the Over the Edge activity are well documented. The game does not provide a freely explorable interior or a complete directory of residents and businesses. Where the available evidence is incomplete, this guide says so rather than presenting tabletop or anime material as playable 2077 content.

Overview

Megabuilding H4 is the large quarantined residential tower in southern Arroyo, Santo Domingo. It is one of the most recognisable buildings in Cyberpunk 2077, despite being largely inaccessible to the player. Its importance comes from its connections to Cyberpunk: Edgerunners: David Martinez and his mother Gloria lived there, and the building serves as the starting point for the side job Over the Edge, which leads to David’s jacket.

In practical gameplay terms, H4 is an exterior landmark, a fast-travel destination and a quest starting point rather than a conventional dungeon or settlement. Its blocked entrances, flashing red warnings and biohazard imagery establish that the building is under quarantine. V cannot enter the tower, visit David’s apartment or explore its supposed shops and residential floors in the base game. The playable content is concentrated around the surrounding pavement, service alleys and the hidden braindance that begins Over the Edge.

Position within Night City

Megabuilding H4 stands in Arroyo, one of the sub-districts of Santo Domingo. It occupies the southern portion of Arroyo and is visually easy to identify: the tower is a huge black-and-yellow structure suspended above the surrounding streets, with illuminated warnings around its inaccessible entrances.

The relevant scope is the building’s exterior and the immediately adjoining alleys and pavements. The wider Arroyo district should not be treated as part of H4. Locations elsewhere in Arroyo, including industrial yards, road junctions and unrelated side-job sites, are neighbouring places rather than internal H4 subareas.

Not included

A map listing identifies both Metro: Wollesen St. and Megabuilding H4 as fast-travel locations in Arroyo. Wollesen St. is useful for approach, but it is not part of the megabuilding itself.

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H4 is designed to look occupied from the outside, but its street-facing presentation is deliberately hostile. Red “NO ENTRY” displays and quarantine markings make the building’s status clear. The visible architecture suggests a large residential megablock with suspended sections, access ramps and lower-level structures, but the game does not open those areas as a normal interior map.

The most important exterior feature is the side alley near the entrance. It contains the green Edgerunners symbol associated with David’s crew and a rubbish bin holding a braindance wreath. This is the practical centre of H4 for players because interacting with that braindance starts the building’s only dedicated side job.

Named places and features

The sources consulted do not establish official names for individual entrances, courtyards, apartment floors, shops or service corridors in the playable 2077 version. It is therefore safer to use descriptive labels such as “east-side entrance” or “braindance alley” rather than inventing floor or doorway names.

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Named places and features

Fast travel

The simplest route is to fast travel directly to Megabuilding H4. From the arrival point, look for the large black-and-yellow tower and follow the exterior path towards the sealed entrance. If the building is difficult to identify, travel to Metro: Wollesen St., which is nearby and provides an alternative approach from the surrounding Arroyo streets.

Recommended walking route

The exact approach can look slightly different depending on the player’s direction of arrival and whether the map marker has already been revealed. The reliable visual clues are the building’s yellow-and-black exterior, the red warnings, the green graffiti and the nearby rubbish bin.

Recommended walking route: steps

  1. 01
    Fast travel to Megabuilding H4 or Metro: Wollesen St.
  2. 02
    Locate the suspended black-and-yellow tower.
  3. 03
    Walk towards the entrance marked by red quarantine or “NO ENTRY” signage.
  4. 04
    Circle towards the side of the entrance rather than trying to pass through the blocked doors.
  5. 05
    Look for the green Edgerunners symbol painted on the wall.
  6. 06
    Search the rubbish bin nearby for the braindance wreath.
  7. 07
    Play the braindance to begin Over the Edge.

Can V enter Megabuilding H4?

No. In the normal base-game experience, the visible H4 entrances remain closed. The building is not handled like V’s apartment in Megabuilding H10, where the player can access a lobby, apartment floor, shops and parking areas. H4’s interior is not available as a standard explorable location.

This distinction matters because H4’s franchise lore describes numerous internal locations, but those descriptions come primarily from Cyberpunk RED material and are not evidence that the same areas are playable in Cyberpunk 2077.

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David Martinez

David Martinez is the building’s most important associated resident. In Cyberpunk: Edgerunners, he lived in H4 with his mother, Gloria. The game does not allow V to visit David’s apartment, but Over the Edge uses the building as the place where V first encounters a recording connected to his story.

David is not physically present at H4 in the 2077 game. His role is represented through the braindance, the graffiti and the later messages that lead to his jacket.

Gloria Martinez

Gloria is also associated with H4 as David’s mother and former resident. She does not appear at the building during V’s visit in Cyberpunk 2077. Her connection is primarily part of the Edgerunners backstory and the environmental context surrounding the quest.

Falco

Falco is not a resident encountered at H4. He is a former member of David’s crew who contacts V during Over the Edge. His message is the bridge between the braindance discovery and the reward at Dam Viewpoint.

Muamar “El Capitán” Reyes

Reyes is a quest contact rather than an H4 resident. V must message him after viewing the braindance. His involvement connects the otherwise isolated H4 discovery to the wider Santo Domingo fixer network.

People from other continuities

The 2045 tabletop material names Mario Fernandez as a resident and describes the Rat Kings as a gang formed inside H4. Those details belong to the earlier tabletop continuity and should not be presented as current 2077 residents or active in-game factions.

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The building’s defining condition in 2077 is quarantine. Franchise material describes a plague or contamination event that caused the NCPD to seal H4, and the 2077 building layout continues to show the quarantine state. However, the game does not turn H4 into a combat zone with a clear interior enemy roster.

About this guide

Spoilers for the Edgerunners-related side job and its reward.

What is not confirmed

There is no reliable evidence that the player can fight through an H4 interior, confront a named boss there, loot quarantined apartments or meet a functioning H4 security team. The presence of warning signs should not be expanded into an invented enemy encounter.

The nearby Over the Edge braindance contains a recording connected to a cyberpsycho incident, but that encounter takes place in the recording’s story rather than as a live fight inside H4.

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Over the Edge is a hidden side job added in the Edgerunners update. It begins outside Megabuilding H4 and eventually awards David’s Jacket. The mission is not an interior exploration of the megabuilding. H4 serves as the discovery site, while the final reward is elsewhere.

Starting the job

The graffiti is the clearest clue. If the mission marker is not obvious, search around the outside of the building rather than attempting to enter through the main doors. Several guides describe the symbol and rubbish bin as being on the east side or in a nearby alley.

Starting the job: steps

  1. 01
    Travel to Megabuilding H4 in southern Arroyo.
  2. 02
    Go to the exterior entrance area.
  3. 03
    Find the green Edgerunners symbol painted near the side of the entrance.
  4. 04
    Search the nearby rubbish bin.
  5. 05
    Take the braindance wreath.
  6. 06
    Play the braindance.

Continuing the job

The jacket is not hidden inside H4. This is an important navigation point: returning repeatedly to the quarantine entrance will not produce the reward. The final collection point is at Dam Viewpoint after the message sequence has advanced.

Continuing the job: steps

  1. 01
    After viewing the braindance, message Muamar “El Capitán” Reyes.
  2. 02
    Wait for the required in-game time to pass.
  3. 03
    Respond to Falco’s message.
  4. 04
    Travel to Dam Viewpoint in the Badlands.
  5. 05
    Find the marked cache overlooking the dam area.
  6. 06
    Collect David’s Jacket.

Reward

The jacket is the principal confirmed gameplay reward for the location’s dedicated side job. The available guides disagree in how they describe its rarity and exact item statistics, particularly across different game versions, so this guide treats it primarily as the confirmed quest reward rather than assigning fixed modern armour values.

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Confirmed H4-related discovery

The braindance is a fixed quest object, not a random drop. It is placed near the exterior of H4 and is associated with the green symbol. David’s Jacket is also fixed quest content, not a procedural or random reward.

No confirmed H4 collectible directory

The consulted sources do not establish a separate set of tarot cards, iconic weapons, shards, skill shards, hidden gems or loot containers exclusive to the H4 exterior. That does not prove that every ordinary loot object is absent, only that a verified named collectible directory could not be established from the available evidence.

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2077 game status

No functional shop, ripperdoc, weapon vendor, clothing store, bar, gym or shooting range is confirmed as accessible inside H4 in Cyberpunk 2077. The building’s exterior signage and background architecture should not be treated as proof that a particular service can be used.

This contrasts with Megabuilding H10, whose game database entry explicitly describes shops, market stalls, a gym and a shooting range. H4 has no equivalent playable service directory in the base game.

2045 tabletop businesses

The following names are associated with H4 in Cyberpunk RED or related 2045 material, not with accessible 2077 gameplay:

These are useful for understanding the building’s wider franchise history, but they should not be listed as active shops V can visit in the 2077 base game.

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The 2045 version

In 2045, H4 was still under construction. The lower sections had residents, workers and businesses, while construction continued above them. The Rat Kings were described as a gang formed by young residents who resented being crowded into a huge unfinished structure without sufficient support. The same material places H4’s earlier administrative identity in Heywood before associating the completed project with Santo Domingo.

This is not a contradiction that should be silently flattened. The 2045 material reflects an earlier stage of the megabuilding’s development, while the 2077 game shows a completed-looking exterior under quarantine in Arroyo, Santo Domingo.

The Edgerunners connection

H4 is strongly associated with David because it was his home before the events of the anime. The building’s most prominent game-world use is therefore commemorative and narrative rather than mechanical. The graffiti and braindance turn an apparently inaccessible landmark into a small piece of environmental storytelling.

The building also appeared in promotional material connected with Cyberpunk: Edgerunners, reinforcing its identity as David’s residential megabuilding.

Address marking

Franchise material notes an “AR494” marking on the building, interpreted as “Arroyo 494”. This is presented as a likely address rather than a fully explained gameplay location code, so it is best treated as environmental detail rather than a navigational requirement.

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For a first visit

  1. 01
    Start at the Megabuilding H4 fast-travel point.
  2. 02
    Photograph or inspect the red quarantine warnings and the suspended tower.
  3. 03
    Walk around the entrance instead of trying to force the doors.
  4. 04
    Search for the green Edgerunners symbol.
  5. 05
    Collect and play the braindance.
  6. 06
    Complete the message steps for Over the Edge.
  7. 07
    Leave H4 and continue exploring Santo Domingo while waiting for the response.
  8. 08
    Travel to Dam Viewpoint when Falco contacts V.
  9. 09
    Collect David’s Jacket.
  10. 10
    Return to H4 only if you want to revisit the visual landmark or compare the game location with Edgerunners.

Quick checklist

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Is Megabuilding H4 enterable?

No, not in the normal Cyberpunk 2077 base-game experience. The exterior and nearby alley are accessible, but the quarantine entrances remain closed.

Is David’s apartment inside the building?

In the wider story, David and Gloria lived in H4. However, V cannot enter the apartment or inspect it directly in the game.

Where does the H4 quest begin?

It begins outside the building, near the green Edgerunners symbol and the rubbish bin containing the braindance wreath.

Do I need Phantom Liberty?

The Over the Edge content was added in the Edgerunners update and is commonly described as available without needing to own Phantom Liberty. The jacket is often discussed in Phantom Liberty-era guides because of the game’s later version history, but the quest itself is not presented by the cited sources as a Phantom Liberty-only mission.

Can I find H4 businesses such as the H4 Clinic or YoBro!?

Those businesses belong to the 2045 tabletop depiction of the building. They are not confirmed as functional, accessible businesses in the 2077 base game.

Is H4 in Dogtown?

No. H4 is in Arroyo, Santo Domingo. Dogtown is a separate area and should not be included within H4’s boundaries.

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This guide should be treated as researched but not an unsupported claim of complete internal coverage. The following points could not be verified sufficiently from the available evidence:

The safest conclusion is that Megabuilding H4 is a quarantined exterior landmark with one dedicated side job and a major Edgerunners lore connection, not a fully explorable megabuilding. Its broader directory of shops, gangs and residents belongs mainly to other continuities and progression states, so those details must remain separate from the playable 2077 location.

Sources