R & C Company

🌌 Worldview

You are an elite mobile pilot for the private military corporation R&C Company (Rebecca & Cecylia Company), dispatched to a frontline outpost in a dangerous conflict zone. Maintaining real-time communication with tactical operators who are experts in their respective fields, you must stop the offensive of an alien mechanical legion pouring out along a single path.

🎮 Key Game Features

• Hybrid Action Defense: Directly control movement, evasion, and skills while building towers with gold and deploying allied squads with Command Points.
• Operator-Centric Playstyle: Each operator features unique player stat modifiers, exclusive tower pools, exclusive card pools, unique allied units, responsive dialogue, and affection-based narratives.
• Deep Strategy: Strategic placement of skill towers that amplify allied towers within range and the timing of allied unit deployment to form defensive lines determine victory or defeat.
• Continuous Live Drop: In the latest WebGL environment, you can download new operators and new battlefields in real-time via CDN without rebuilding the client.

Controls

| Control Key | Function | Description | |---|---|---| | W, A, S, D / Arrow Keys | Player Movement | Maneuver freely across the battlefield and control your distance from enemies. | | Space (Spacebar) | Overdrive Skill | Triggers a high-speed 4-hit area attack and a buff that increases movement speed by 1.5x. | | Left Mouse Click | Build Tower / Select UI | Select a tower from the build menu and click a grid slot to construct it. | | Deploy UI Operation | Deploy Allied Units | Spend Command Points (CP) to immediately deploy frontline and backline units. | | ESC / Right Mouse Click | Cancel Build / Pause | Cancel construction preview or open the game pause menu. |

💡 Auto-Fire System: The player's basic attack automatically targets and fires at the nearest enemy within range.

Core Gameplay Loop

1. Wave Start: Enemies advance toward the base along waypoint paths.
2. Maneuver and Engage: The player moves directly to attack enemies, earning gold, experience, and CP upon defeating them.
3. Tower and Unit Deployment: Use earned gold to build towers in grid slots and deploy allied units to the front lines using CP, which regenerates automatically over time.
4. Roguelite Level-Up: Upon leveling up, the game pauses, and you select 1 of 3 randomly presented cards to enhance your build.
5. Build Phase (10 seconds): A 10-second preparation time is given after the wave ends to build additional towers and perform tactical redeployment.
6. Stage Clear & Infinite Record: Complete the operation by defeating the final wave boss or break your high wave record in Endless Mode.

Operator Loadout System

Operators are not just for show; they are tactical playstyle packages. Depending on the operator you choose, your player stats, available tower types, card pool, and allied unit roster will change completely.

👩‍✈️ 5 Operator Detailed Specifications

| Operator | Combat Theme | Exclusive Allied Units (Frontline / Backline) | Playstyle & Strategic Features | |---|---|---|---| | 🛡️ Cassia | Standard Defense & Tower Firepower | Aegis Guard Vanguard Gunner | A standard defensive operator who builds a solid defensive line with shield bearers and completes a powerful firepower network by clustering attack and skill towers. | | 🎲 Calliste | CP Economy & High Risk/High Reward | Heavy Tank Combat Drone | An offensive operator who pushes the front line with explosive CP income and a heavy tank corps, overwhelming enemies with gambling-style buffs and destructive firepower. | | 🌐 Aurora | Electronic Warfare Debuff & Killzone | Vulnerable Drone Slow Drone | An electronic warfare specialist who operates debuff drones to slow enemy movement and amplify damage taken, designing the optimal area-of-effect killzone. | | 🏎️ Sylvia | Pit-Wall Maneuvers & Battlefield Repair | Pace Car Pit Crew | A mobile support operator who uses high-mobility armored vehicles and continuous repair units to intervene immediately in crisis situations and restore the front line. | | 🧪 Valentina (Live Drop) | Chemical Corrosion & Chain Explosion | Sludge Rover Pyro Crawler | A remote-only chemical warfare operator who lays down acidic sludge on the battlefield to corrode enemies and triggers area-of-effect chain explosions with backline mortar fire. |

Allied Units and Command Point (CP) System

Allied units are summoned using Command Points (CP), a resource independent of gold. Once summoned, units deploy from the base and advance automatically, moving against the enemy's waypoint path.

⚙️ Command Point (CP) Mechanism

• Auto-Regeneration: CP regenerates automatically at a steady rate over time (default 4 CP/s).
• Independent Economy: Gold (for permanent tower construction) and CP (for consumable unit deployment) are separated, allowing for flexible tactical switching without resource interference between towers and units.

⚔️ Frontline Engagement Mechanism

• Complementary 2-Unit System: Every operator possesses 1 type of frontline unit (tank/area/melee) to hold the line and 1 type of backline unit (gunner/drone/artillery) to support with firepower.
• Frontline Defensive Line Formation: When allied units encounter enemies within the center-point contact range at the front, they immediately stop and begin engagement. Enemies also stop advancing to engage with allies, physically blocking them from breaking through to the base.
• Pure C# High-Performance Instances: Implemented by separating pure C# logic (AllyUnitInstance) and lightweight views (AllyUnitView) to ensure no frame drops occur even when dozens of units and enemies clash simultaneously.

Tower Defense System (Attack, Skill, Power)

Towers are built on grid slots on the battlefield and are clearly divided into 3 categories based on their role.

🔴 Attack Towers (6 types)

• Standard Machine Gun: A standard tower with balanced fire rate and range.
• Rapid-Fire Cannon: A close-range firepower tower that melts single enemies with high-speed fire instead of range.
• Sniper Cannon: A tower that snipes distant enemies with long range and powerful single-shot damage.
• Explosive Shell Turret: A tower that crushes groups of enemies by dealing area-of-effect (AoE) damage within a radius at the impact point.
• Venom Sprayer: A tower that slowly breaks down high-HP enemies by accumulating damage-over-time (DoT).
• Piercing Railgun: A piercing tower that skewers all enemies along a straight trajectory.

🔵 Skill Towers (6 types) — The Core of Clustering Strategy

• Attack Power Amp Aura: Multiplicatively enhances the damage of attack towers within range by a percentage.
• Firing Acceleration Aura: Dramatically boosts the attack speed of attack towers within range.
• Freeze Aura: Continuously slows the movement speed of enemies that enter its range.
• Vulnerability Aura: Significantly increases all damage received by enemies within range.
• Overheat Buff Tower: Simultaneously boosts the attack power and projectile speed of surrounding towers.
• Precision Observation Tower: Enhances the range and critical hit probability of surrounding towers.

⚠️ Placement Tip: The aura of a Skill Tower only applies when an Attack Tower is within the Skill Tower's range. The key is Clustering placement, where multiple attack towers are built around a single skill tower.

🟡 Power Towers (6 types)

• Global Attack Power Generator: Permanently enhances the base attack power of all friendly towers and the player on the entire map.
• Global Communication Accelerator: Shortens the attack cycle of all friendly towers on the map.
• Base Nano Repairer: Continuously restores a certain amount of HP to damaged outposts every second.
• Gold Auto-Miner: Periodically produces additional gold during waves.
• CP Energy Amplifier: Improves the natural recovery speed of Command Points per second.
• Tactical Radar Base: Increases the amount of experience points gained when killing enemies.

🏗️ Slot Management and Demolition Rules

• Installation Slot Limit: Slots are limited to 3 basic attacks, 1 skill, and 2 powers, which can be expanded with level-up cards.
• Demolition Penalty: When demolishing a tower, you must pay an additional 75% of the construction cost rather than receiving a refund. This prevents indiscriminate repositioning, but the penalty can be mitigated through Tactical Change cards.

Player Unit Part Customization

The combat unit piloted by the player can be customized by swapping 5 types of parts to complete your own combat style.

| Slot | Domain | Major Gimmick & Weapon Archetype Examples | |---|---|---| | 🚀 Thruster | Movement Speed | High-mobility booster, Overdrive-linked acceleration thruster | | 🔫 Turret | Basic Attack Judgment | Single-shot standard cannon, Dual-barrel rapid-fire cannon, Piercing laser, Wide-area shotgun | | 🛡️ Body | Max HP | Reinforced heavy armor plate, Impact-absorbing energy shield body | | ⚙️ Driver | Overdrive Skill | Cooldown reduction driver, Burst 6-shot sustained driver, 2-stack charge driver | | 🔮 Special | Rule Breaker Gimmick | Emergency teleport during base crisis, 1-time instant revive upon death, Global EMP |

💎 4-Tier Part Grade System

1. Common: Default equipped parts (Base stats).
2. Advanced: +30% performance improvement compared to base and unlocks 1st special gimmick.
3. Elite: Extreme stat boosting of +70% compared to base.
4. Legendary: Provides permanent +50% stats along with a powerful conditional rule-breaker gimmick for turning the tide of battle.

Roguelite Upgrade Cards

When a player kills enemies and collects experience to level up, they choose 1 out of 3 randomly presented cards to complete their build.

🎴 Card Composition and Balance Principles

• Maintaining Defense Identity: 73% of the card pool consists of tower and base-related cards, inducing strategic build-up inherent to tower defense rather than devolving into a pure action game.
• New Tower Unlocks: Selecting a special tower card does not replace an existing tower but is permanently added to the construction options.
• Experience Squared Scaling: The experience required for leveling up increases according to the formula Base + Growth × Level², maintaining appropriate growth tension despite explosive DPS increases in the late game.
• Safe Stacking Rules: Tower buffs stack multiplicatively to create powerful synergies, and enemy status effects (slow/vulnerability/poison) are handled safely using a duration refresh method to prevent multiplicative runaway.

Enemy Legions and Special Gimmicks/Bosses

As waves progress, enemies scale in both quantity (budget) and HP multiplier per unit.

👾 3 Types of Normal Enemies

• Normal Infantry: Basic enemy with standard HP and movement speed.
• Charging Bug: Enemy that tests the player's aim and reaction speed with low HP and high movement speed.
• Heavy Tanker: Enemy that tests the focus of friendly firepower with slow speed and high HP.

⚠️ 4 Types of Special Gimmick Enemies

• 🛡️ Defend (Defense Aura): Emits a green aura that amplifies the max HP of other enemies within a 4m radius by +10%.
• 💚 Heal (Healing Drone): Periodically restores the HP of nearby injured enemies in a wide area.
• 🔵 Heavy Tanker (Frontal 180-degree Shield): Reduces all direct damage coming from the front 180-degree angle by 50%. Must be countered with side/rear attacks or persistent area-of-effect damage.
• 💥 Explode (Self-Destruct Drone): A dangerous unit that causes a powerful self-destruct explosion when approaching friendly front lines or bases.

👑 Promoted Bosses & Stage Bosses

• Promoted Boss: In infinite mode and specific waves, one of the normal enemies grows in size (1.5x) and its HP and attack power are significantly amplified, appearing as a promoted boss.
• Real-time Collision Synchronization: The contact judgment and engagement defense lines are precisely synchronized with the boss's enlarged appearance, providing a realistic raid battle.

Operation Modes (Campaign & Endless)

🗺️ Operation Campaign (Chapter 1: 1-1 1-8)

Each stage features unique battlefield backgrounds, tactical waypoint paths, tower-buildable grid layouts, and special enemy compositions.

• 1-1 1-3: Basic engagement and defense aura unit response training.
• 1-4 1-6: Complex defense lines combining healing units and high-speed charging compositions.
• 1-7 1-8: Lava terrain self-destruct drone offensive and frontal shield heavy tanker breakthrough operations.

♾️ Endless Infinite Mode

• Budget-based Procedural Waves: Endless enemy legions swarm through a fixed-seed random number algorithm, ensuring an independent yet sophisticated difficulty curve for every run.
• High Score Challenge: A ranking challenge mode that competes on reached waves, total kills, gold acquired, and survival time.

Addressables Real-time Live Drop

R&C Company is designed based on the Unity Addressables 3-tier architecture.

• Non-stop Live Updates: Without having to re-download or re-build the player web client, new operators (Valentina), new friendly units, and new stages can be downloaded in real-time from a remote CDN server and played immediately.

• Data-Driven Scalability: All combat mechanisms are implemented as stateless SO hooks, allowing for the continuous supply of new tactical characters and battlefields purely through data asset assembly, without modifying C# code.

Core Tactical Tips for Victory

1. Build Early Clustering: In the first 1-2 waves, build 1-2 attack towers, and around wave 3, construct skill towers (Attack Power Amplification or Firing Speed Acceleration) so their range overlaps with the attack towers to boost firepower.
2. Prevent CP Resource Leakage: CP does not recharge once it hits the cap (default 100). Even if the front line isn't being pushed, consistently deploy front/rear units to maintain the forward defensive line.
3. Overdrive Crisis Escape: The Spacebar Overdrive skill provides instant 4-hit area damage and increases movement speed by 1.5x. Use it as a breakthrough when surrounded by enemies or when your base is under sudden attack.
4. Heavy Tanker Strategy: Heavy Tankers with blue shields absorb 50% of frontal attack damage. Maneuver behind them to shoot their rear, or neutralize them with Venom Tower's damage-over-time and Chemical Sludge puddles.
5. Utilize the 10-Second Build Phase: During the 10 seconds immediately after a wave ends, calmly assess the battle situation and expand with Power Towers or additional attack towers if you have the gold.

The front lines of R & C Company await your command, Pilot. Deploy now!