They Are Billions is the quintessential "glass cannon." As a hero unit, she trades the raw durability of Caelus for unmatched agility and rapid-fire lethality. To build her effectively in the campaign, you must prioritize her ability to kite infinite hordes while maximizing her crowd-control potential. The Core Strategy: Hit and Run Calliope’s primary strength is her movement speed

. Unlike other units, she can outrun almost every threat on the map. A "New" or optimized build focuses on making her an untouchable skirmisher who clears the map ahead of your expansion. Key Upgrade Paths Attack Speed & Reload:

This is her bread and butter. Calliope relies on a high volume of fire to stun-lock small groups of runners. Maxing out her fire rate ensures that nothing gets close enough to touch her paper-thin armor. Movement Speed:

Doubling down on her speed allows her to "dance" around Giants and Mutants. In the later missions, she acts as the ultimate decoy, pulling thousands of infected away from your walls while your snipers pick them off. Damage & Armor Penetration:

While she won't one-shot high-tier enemies, increasing her base damage helps her melt Executive and Fatty types before they can close the gap. Tactical Execution In a solid Calliope build, micro-management

is non-negotiable. You shouldn't park her behind a wall; she belongs in the open field. Use her to "twirl"—moving in a circular pattern to bunch up zombies—then utilize her high fire rate to thin the herd. Her ultimate utility lies in scouting and kiting

. By the mid-game, a well-built Calliope can solo-clear large portions of the map, saving you thousands in gold and resources that would otherwise go toward a standing army. The Verdict

The "New" Calliope build isn't about making her a tank; it's about making her frictionless

. By focusing on speed and rate of fire, you transform her into a scalpel that can dismantle the undead threat before it ever reaches your colony’s gates. for her early-game campaign levels?

They Are Billions is the agile "hit-and-run" hero agent of the New Empire. Unlike the tanky Caelus, she relies on superior movement speed and rapid-fire pistols to clear tactical missions through kiting and speed-running. Recommended Hero Build

For a "new" or optimal build, prioritize stats that mitigate her low health and maximize her ability to kill dangerous enemies like Harpies before they reach her. Priority 1: Attack Range & Damage

is critical. High-level Calliope can outrange Harpies (6+ cells), allowing her to 2-shot runners and potentially kill Harpies in 4–5 hits before they can strike. Priority 2: Movement Speed

Essential for kiting. Calliope’s speed allows her to trigger enemy attack animations and then step out of range before the blow lands. Priority 3: Survivability (Armor & HP) Invest at least one point each

into Armor and HP. This allows her to survive 3 hits from a Harpy rather than being instantly annihilated. Note that Life perks generally offer more value than Armor for her specific stat distribution. Secondary: Attack & Load Speed While she is naturally fast, adding roughly 40% Load Speed

makes her more convenient to use by reducing the need for constant "animation canceling". Core Gameplay Strategies Calliope | They Are Billions Wiki | Fandom

They Are Billions , is a high-speed, rapid-fire agent whose primary advantage in tactical missions is her ability to kite enemies. Because she is naturally fragile compared to Caelus, a "new" or optimized build focuses on maximizing her offensive lethality to eliminate threats like Harpies before they can close the gap. Calliope Optimized Build Order

For a standard campaign run, prioritize these upgrades to overcome her low base damage:

Priority 1: Attack Range & DamageFocus on nodes like Improved Vision III (+1 Attack Range) and Aim IV (+50% Attack Damage). Increasing range is critical for surviving high-tier enemies.

Priority 2: Attack Speed & ReloadingInvest in Dexterity (+20% Attack Speed) and Quick Reflexes II (+40% Weapon Loading Speed). This reduces the downtime between shots, making her feel much more responsive.

Priority 3: Utility (Health/Armor)Only take these if they are on the direct path to a damage or range node. Her base speed is already enough to outrun most non-elite infected. Essential Tactical Strategies Technology Tree Progression Guide (Edited)

In They Are Billions, Calliope is a high-speed hero unit designed for "hit-and-run" tactics in the New Empire campaign. Unlike her counterpart, Caelus—who acts as a slow-moving, high-damage "stationary weapons platform"—Calliope relies on superior mobility and kiting to survive dense hordes. The Core Calliope Philosophy: Speed Over Brute Force

Calliope’s primary weapon, The Devil's Sisters (dual pistols), features a high fire rate but low damage and short range. Her gameplay revolves around:

Kiting Mastery: She can run circles around standard infected, utilizing her speed (base 3.2 vs. Caelus’s slower movement) to whittle down enemies without taking hits.

Rapid Exploration: Her movement speed makes her significantly faster for clearing large Tactical Mission maps, which can otherwise feel tedious.

Micromanagement: She requires constant player input to maintain distance, especially against fast enemies like Harpies that can quickly overwhelm her low health. Optimization: The "Harpy-Killer" Build

A "new" or optimized build for Calliope often focuses on reaching specific breakpoints to handle elite infected, particularly Harpies, which are her greatest threat.

Primary Damage Thresholds: Aiming for a damage stat of 33 (via damage upgrades) allows Calliope to kill a Harpy in exactly four shots. This prevents "overkill" and maximizes her efficiency against high-priority targets. Essential Perk Path:

Attack Damage: Priorities nodes like Aim I-IV (+30% to +50%) to ensure she doesn't get stuck kiting a single target for too long.

Attack Range & Vision: Take Improved Vision I-III early; even a +1 range boost significantly increases the "safety window" for kiting Harpies before they can trigger their jump animation.

Attack Speed: Invest in Dexterity perks to capitalize on her already high fire rate, though some players find the benefit less noticeable without matching Reload Speed upgrades.

Survivability: While veteran players prioritize damage, taking at least one Life or Armor perk is recommended for high-difficulty runs (500%+) to prevent being two-shot by a single mistake. Tactical Execution Calliope | They Are Billions Wiki | Fandom

The Ultimate Calliope Build Guide: Mastering the "Devil’s Sisters" In They Are Billions,

is the agile, high-speed alternative to the lumbering Caelus. While she has lower health and damage per shot, her ability to kite and fire rapidly makes her a lethal asset for tactical missions when built correctly. Core Character Stats Health: 60 HP (Low, requires careful positioning). Attack Range: 4.5 tiles. Attack Speed: 5.0 (Base). Movement Speed: 3.2 (Fastest hero). Recommended Skill Tree Priorities

To maximize Calliope’s potential, focus on Damage breakpoints and Attack Speed rather than survival stats. Damage & Range (High Priority):

Invest in at least three damage upgrades (+30%, +40%, +50%) to reach approximately 33 damage. This allows Calliope to kill Harpies in exactly 4 shots.

Maxing her range to 6.5 is critical for engaging enemies before they can close the gap, potentially making HP/Armor upgrades redundant. Attack & Reload Speed:

Reload Speed: A single point in +40% load speed significantly reduces re-targeting animations, making "kiting" much smoother.

Attack Speed: Multiple perks can boost her speed to nearly 3x her base, allowing her to shred through crowds of runners. Utility & Survival:

Movement Speed: Already her greatest strength; one point is usually enough to maintain a safe distance from most infected.

Noise Reduction: Generally considered underwhelming; specialized players prefer killing enemies quickly over being stealthy. Tactical Mission Strategy

Run and Gun: Utilize her superior movement speed to "kite" hordes. Fire a few shots, move back, and repeat.

Animation Canceling: You can ignore reload times by issuing a new attack command immediately after a shot, a trick that works particularly well with Calliope’s rapid pistols.

Harpy Engagement: Always aggro Harpies at max range (6+ cells). If they get too close, rely on grenades or medkits rather than trying to tank the damage. Late-Game Viability

In high-difficulty 800%+ runs, a fully upgraded Calliope becomes a "Valkyrie," often accompanied by veteran Rangers in tactical missions. While Caelus excels at stationary defense with AOE, Calliope is the superior choice for players who prefer a proactive, micro-intensive playstyle to clear maps.

They Are Billions "The New Empire" campaign, is the agile, rapid-fire hero designed for hit-and-run tactics

. While her counterpart Caelus excels at stationary area-of-effect damage, Calliope relies on movement speed and fire rate to clear tactical missions without taking damage. Core Build Strategy: The "Glass Cannon"

Since Calliope can kite almost every enemy, her primary build path focuses on maximizing damage output and range to kill threats before they reach her. Most high-level players prioritize the following: Primary Priority: Damage & Range

: Calliope’s base damage is low, requiring multiple shots for even basic runners. Investing in (Damage) and Improved Vision

(Range) allows her to two-shot runners and engage Harpies from a safer distance. Secondary Priority: Attack Speed

: Because her base attack speed is already high (5.0), percentage-based buffs like

(+20%) provide massive benefits, potentially increasing her fire rate to over 14.0 with three perks. Essential "Survival" One-Pointers : At least one point in (Life) and Protection

(Armor) is highly recommended for higher difficulties like Apocalypse. This prevents her from being instantly killed by a single mistake against Harpies or Spitters. Critical Skill Nodes for Calliope

You only receive 9 skill points throughout the campaign, so pathing is critical: Steam Community

Who is Calliope? (And Why She Breaks the Meta)

Before we dive into the "build new" order, we must understand the asset. Calliope is not a standard unit. She is a hero unit equipped with a prototype "Sonic Cannon"—a weapon that fires piercing sound waves.

Her Stats:

In the old meta, loud units were avoided early game. The "Calliope build new" philosophy flips this on its head. Instead of hiding from the noise, we weaponize it.

Abstract

This paper analyzes a novel build order and strategic role for the Calliope unit in They Are Billions (post-2024 balance context assumed). It outlines unit strengths/weaknesses, optimal tech path, economy and base layout integration, tactical use in offensive and defensive phases, counters, and suggested micro and macro considerations. The goal is a reproducible, high-win-rate approach for mid-to-late game survival.

Day 0 – Initial Spawn

Step 2: The "No Wall" Expansion (Days 10-25)

Normally, you spend stone and wood on layers of defense for a new housing district. With Calliope on patrol, you don't need that.

Build Order Adjustment:

  1. Skip early Ballistas. Use that wood for Farms and Tents.
  2. Claim the forest. Use her vision radius to secure a massive farm sector.
  3. Gold Rush. Because you aren't buying towers, you can afford the Market and Bank by Day 12.

Calliope acts as a mobile Tesla tower. Where she walks, you can build. Just watch her stamina (energy) and pull her back to a Stone House to recharge if you have the "Fatigue" mutation on.

Conclusion: Is the Calliope Build Viable for "New" Players?

This is an advanced strategy. For a new player trying to beat the survival mode, this build is a double-edged sword. It requires perfect kiting micro and map awareness. However, for the new meta—the current state of They Are Billions post-update 1.4—the Calliope build is the fastest way to clear the desert and frozen maps where resources are scarce.

If you are tired of the silent, slow ranger grind, try the Calliope build. Embrace the noise. Let them come. They are billions, but you have the loudest gun in the empire.

TL;DR for "Calliope build new": Rush Calliope, spam tents for wood buff, kite aggressively, never build stone houses, pivot to Thanatos by day 45. Noise is your economy.

Day 3 – The Calliope Crescendo

11. Performance Metrics & Evaluation

The "New Dawn" Build Order (Days 0-30)

This build prioritizes a compact, high-efficiency housing block centered around a single Calliope. We will treat the Calliope as a Tier 1.5 structure—just after the Wood Workshop but before the Stone Workshop.