Sin City

Biodata

Feature	Value
Name	Sin City
Original Name	罪城
Type	Prison metropolis
Location	KL-21 Prison Star / Frontier Prison Star
Population	Over 20 million Galaxy prisoners 20
Role	The sole metropolis on Prison Star and its principal criminal settlement 4
First Appearance	4

Cityscape

Sin City is a massive punk-themed, cyberpunk-wasteland metropolis built from irregular low-rise districts, scattered skyscrapers, elevated walkways, and tangled transport routes. Holographic projections and towering structures give its disorderly layout a sense of “frenzied freedom.” 4 20

• Smoke from fires and explosions is frequently visible across the city, even from more than ten kilometers away. 20
• Its outer regions include kilometer-wide industrial complexes filled with machine oil fumes, black smoke, makeshift gates, and mech wreckage. 7
• The Central TV Tower broadcasts citywide programming through holographic screens; its blue defensive barrier has repelled anti-tank rockets. 4
• The Wicked Soul Market is a major outer-ring market district contested by the Black Mech Gang, the Viper Gang, and the Sin City Council. 34 36
• The Kasar Street Block is a heavily defended Council-controlled area with mechanized troops, alarms, surveillance, and electromagnetic tanks. 23 44
• Three Star Rail Defense Ships hover above the city, serving as a constant reminder that its population remains under Starport control. 20

Administration and Factions

Sin City Council

The Sin City Council functions as Sin City’s de facto ruling power, though its direct control is limited by gang influence and black-market networks. It is led by Chairman Rosas Carter, while the Council Speaker is an octopus-like alien. 20 52 70

• Council or Council-recognized gang certification is needed for long-term residence and access to most shops and markets. 18 20
• The Council suppresses the Pan-Human population and seeks to eradicate the Spark Gang because of conflicting interests. 18
• The Viper Gang and Blade Armor Gang are Council-aligned forces. 18
• It maintains advanced defenses in Kasar Street Block, including mechanized units and electromagnetic tanks. 23 44

Black Mech Gang

The Black Mech Gang was initially Sin City’s major neutral power, dealing with other factions primarily through trade. It controlled approximately 80% of the city’s equipment modification, mechanical work, and repair businesses, along with 40% of its weapons trade. 7 20

• Roughly one-third of the weapons across Frontier Prison Star were handcrafted by Black Mech Gang mechanics. 7
• Its leadership had not appeared publicly for decades, leaving its long-term activities unknown. 20
• The gang and the Sin City Council remained in a longstanding standoff before the Council formally declared total war on it. 18 52
• Its mechanics had spent decades reverse-engineering a damaged Primary Civilization warp engine and manufacturing restricted industrial equipment to repair it. 75

Spark Gang and Pan-Humans

The Spark Gang is the core Pan-Human faction operating around and within Sin City. Though unable to operate openly under its own certification, it secretly controls black markets, illicit shops, and several smaller gangs. 18 20

• Pan-Humans face severe danger within the city, particularly from the Council, Viper Gang, and Blade Armor Gang. 18 20
• The Spark Gang’s black-market networks provide an alternative route into the city and access to supplies, mechanical workshops, and information. 21 22
• After Jiang Xiao’s actions at Wicked Soul Market, the Spark Gang was able to enter the area and collect resources without resistance. 39

Economy and Technology

• Sin Coins were recognized by both the Black Mech Gang and Sin City Council until their war caused the currency’s value to collapse. 67
• Most conventional commerce required gang or Council authentication through network terminals. 20
• The city’s technology ranges from improvised cybernetic modifications and hand-built firearms to Council electromagnetic tanks and automated defenses. 7 44
• Starport restrictions prohibit local factions from developing military terminals capable of threatening the defense ships or weapons with ranges exceeding ten kilometers. Violators risk annihilation by the planetary defense fleet. 28 36
• Sin City’s network infrastructure was split into separate Black Mech Gang and Central TV Tower local networks once the total war began. 67

Security and Social Conditions

Sin City is defined by gang violence, prisoner exploitation, and constant competition for territory, weapons, and resources. Its criminal population includes numerous alien races, while Pan-Humans are frequently treated as prey or commodities by hostile factions. 20 26 35

• Public violence is common enough that gangs regularly compete through assassinations, market seizures, and armed territorial expansion. 27 35
• The Viper Gang openly displayed captive Pan-Humans in cages during the reopening of Wicked Soul Market. 36
• The city’s orbital defense ships prevent its factions from freely escalating into long-range warfare. 20 65
• The Central TV Tower’s broadcasts, hosted by Kliffen, amplify major conflicts and spread news throughout the metropolis. 4 27 37

History

Old Capital Battle Royale Broadcast

Sin City first appears while broadcasting the Old Capital deathmatch to its population. Kliffen’s taunting coverage provoked armed unrest, including multiple anti-tank rocket attacks on the Central TV Tower. 4

Jiang Xiao’s killing spree in the Old Capital soon made the city wary of the “Old Capital Killing God,” a Pan-Human hunter capable of rapidly killing martial artists. 10 13

Jiang Xiao’s Arrival

Jiang Xiao entered Sin City with Xi Ling and Bruce after obtaining access through the Spark Gang’s network. He entered the Yuanjin Black Market under a gray robe and began using its mechanical resources to develop his Mechanist profession. 20 21 22

His attack on a Mech Martial Gang direct market killed four Tier 2 martial artists, forty-one Tier 1 martial artists, and over four hundred gang members, publicly confirming that the Old Capital Killing God had entered Sin City. 27

Wicked Soul Market Conflict

The Viper Gang and Sin City Council moved to take control of Wicked Soul Market, a district previously within Black Mech Gang territory. The event marked a major escalation in the Council–Black Mech Gang conflict. 34 35 36

At the market’s opening, Jiang Xiao confronted and killed Gulab, the Viper Gang’s Tier 2 Peak deputy leader, in a battle broadcast across Sin City. The death forced the Viper Gang to temporarily avoid direct conflict with the Pan-Humans. 37 39

Kasar Street Block Assault

Jiang Xiao and Xi Guang launched a surprise offensive against the Council’s forces in Kasar Street Block. They defeated over twelve hundred alien combatants before engaging the Council’s mechanized reinforcements and Tier 2 elites. 43 44

The pair ultimately slaughtered thousands of aliens and devastated the Council army in the district. Signal interference prevented fifteen electromagnetic tanks from firing, with the Black Mech Gang suspected of causing the disruption. 45

Total War and Zerg Invasion

The Sin City Council formally declared the Black Mech Gang an enemy, ordering every gang leader to choose a side and ending the city’s remaining political neutrality. 52

After the Council activated a wave-inducing device, a Zerg swarm estimated at five to seven million advanced toward Sin City. The invasion plunged the metropolis into widespread chaos, with Zerg and prisoners killing one another throughout its districts. 65 66 75

During the crisis, the Black Mech Gang’s main base was reportedly flattened by a descending defense ship, while the same ship later targeted the Blade Armor Gang headquarters with its plasma cannons. 76