Karan Nandkar
Senior Gameplay Engineer
← PROJECTS / BULLBASH
// CASE STUDY

BullBash

Real-Time Multiplayer Systems Built for Fair Competitive Play

UnityMobile · PvP
Shipped
Unity · Mobile Multiplayer · Real-Time Strategy · Network Optimization

A fast-paced PvP strategy game built around real-time multiplayer fairness, responsive gameplay systems, and stable mobile performance across a wide range of devices.

BullBash focused on competitive player-vs-player battles where timing, positioning, and tactical decision-making directly determined match outcomes.

The challenge was not just making multiplayer work.

It was making multiplayer feel fair under real mobile network conditions.

// PROJECT OVERVIEW

BullBash is a real-time PvP strategy game inspired by Clash Royale, designed for mobile devices where players compete in fast tactical battles using units, positioning, and power-up decisions.

Unlike turn-based strategy games, every action happens under live match pressure.

That creates a very different technical problem.

Players do not judge multiplayer by whether it technically connects.

They judge it by fairness.

If delayed inputs, desync, or inconsistent battle outcomes occur, players experience it as broken gameplay, not network instability.

The goal was to build multiplayer systems that remained responsive, predictable, and trustworthy even under unstable mobile network conditions, while still supporting dynamic strategy and strong performance across device tiers.

// MY OWNERSHIP

I worked on multiplayer gameplay systems, real-time synchronization strategy, gameplay depth systems, and mobile performance optimization across core PvP loops.

Multiplayer synchronization and state consistency
Network optimization and RPC strategy
Power-up system design for mid-match strategy
Lag compensation and gameplay fairness handling
Gameplay responsiveness improvements
Real-time state validation and conflict reduction
Mobile performance optimization
Object pooling and memory stability

The focus was not simply multiplayer functionality, but competitive fairness and long-term production stability.

// THE CORE CHALLENGE

Real-time mobile multiplayer creates a trust problem.

Players must believe the game is fair.

As development progressed, three major problem areas emerged:

Each issue looked separate, but the root cause was the same: Systems that worked technically were not yet strong enough for competitive gameplay.

THE REAL ENGINEERING QUESTION

How do we make players trust both the gameplay and the multiplayer system under imperfect network conditions?

That question shaped every major decision.

// KEY TECHNICAL DECISIONS
01

Multiplayer Synchronization and Lag Compensation

Early multiplayer builds suffered from:

  • Noticeable input delay
  • State desynchronization between players
  • Inconsistent battle outcomes under poor mobile network conditions

This directly damaged competitive fairness.

Instead of pushing more data, I focused on sending less but sending the right information.

This included:
  • Reducing message size and update frequency
  • Sending only gameplay-critical state changes instead of full state snapshots
  • Efficient serialization for smaller payloads
  • Cleaner RPC and SyncVar usage with only authoritative data synced
  • Lag compensation so delayed actions could resolve fairly without breaking match consistency

The goal was not perfect network conditions.

It was predictable and trustworthy gameplay under imperfect ones.

This significantly improved player confidence in match outcomes.

02

Dynamic Mid-Match Power-Up Strategy

Early testing revealed a different problem.

Matches became too predictable once they started.

Players had limited ways to adapt during live gameplay, which reduced engagement and strategic depth.

I designed and implemented a dynamic power-up system that created meaningful decisions during active matches instead of passive bonus collection.

This included:
  • Contextual power-up choices based on live match progress
  • Real-time decision making without interrupting gameplay flow
  • Fast and intuitive UI for high-pressure selection
  • Balanced power-up effects designed to encourage adaptation instead of repetition

This shifted power-ups from passive rewards into active strategic tools.

The result was stronger player engagement and less predictable gameplay outcomes.

03

Mobile Performance and Visual Stability

Stylized visuals supported gameplay clarity, but performance varied significantly across device tiers.

This created:
  • Frame drops during intense combat scenarios
  • Higher memory usage on lower-end devices
  • Runtime spikes caused by allocations and unnecessary processing

Optimization focused on keeping battles smooth without sacrificing visual readability.

This included:
  • Texture compression and reduced polygon complexity
  • Main loop optimization and removal of unnecessary calculations
  • Adaptive frame rate strategies based on device capability
  • Dynamic graphical adjustments for weaker hardware
  • Object pooling and garbage collection optimization to prevent runtime spikes

The goal was stable competitive gameplay, not maximum visual complexity.

Performance consistency matters more than visual ambition in PvP systems.

// RESULTS

The final architecture delivered stronger multiplayer fairness, better gameplay responsiveness, and stable mobile performance.

Significantly reduced lag and multiplayer desynchronization
Fair and predictable real-time PvP battles across unstable network conditions
Higher player engagement through dynamic mid-match strategy systems
Stable frame rates across low-end and mid-range mobile devices
Scalable multiplayer systems ready for live competitive environments

The result was not just a functioning multiplayer game, but a competitive system players could trust.

That trust is the real product.

// WHAT I'D IMPROVE NEXT

If BullBash were extended further, the next major focus would be:

The important part is that the current systems were designed to support these improvements without requiring major architectural rewrites.

That is what scalable multiplayer architecture should do.

// FINAL REFLECTION

Multiplayer performance is not a networking problem first.

It is a systems design problem.

Sending more data does not create fairness.

Clear authority, predictable resolution, and trust in outcomes do.

BullBash reinforced a principle that applies across all competitive multiplayer systems:

Players forgive difficulty.

They do not forgive unfairness.

Good multiplayer engineering protects fairness before it protects features.

That is what keeps players coming back.

← Back to Projects// BULLBASH · 2023