In my last project we had a 50 km open world with thousands of dynamic objects causing frame‑rate drops due to naive O(n²) collision checks.

I needed to design a system that reduced collision checks while keeping accuracy for player‑critical interactions.

I implemented a hierarchical grid combined with a quad‑tree for static terrain and a dynamic bounding‑volume hierarchy for moving objects. Objects were inserted into the appropriate cells each frame, and collision queries were limited to neighboring cells. I also added lazy updates for objects that moved slowly to reduce overhead.

Collision checks dropped by ~78%, frame rate increased from 45 FPS to 62 FPS on target hardware, and the system scaled without major refactoring.

During a mid‑size studio project we needed to decide on a rendering pipeline for a sci‑fi shooter with many dynamic lights.

Evaluate forward vs. deferred rendering to meet visual fidelity and performance targets on consoles.

I explained that forward rendering processes each object once per light, which is efficient with few lights but struggles with many dynamic lights. Deferred rendering separates geometry and lighting passes, storing G‑buffer data, allowing many lights with minimal per‑pixel cost but increasing memory usage and complicating transparency. I recommended deferred rendering because the game required 50+ dynamic lights per scene, and the target hardware had sufficient VRAM.

The team adopted deferred rendering, achieving stable 60 FPS with rich lighting, and we only needed to implement a custom solution for transparent objects.

In a multiplayer arena game, the lead designer wanted a fast‑respawn mechanic, while the programmer warned it could cause server overload.

Facilitate a solution that satisfied design goals without compromising server stability.

I organized a joint meeting, asked the designer to outline the gameplay intent, and the programmer to explain the technical limits. We brainstormed alternatives, eventually prototyping a staggered respawn queue with visual cues. I also suggested a server‑side load‑balancing script to smooth spikes.

The mechanic was approved, player churn decreased by 12%, and server load remained within safe thresholds.

While working on a mobile puzzle game, I noticed the rise of ARKit and ARCore for augmented reality experiences.

Assess whether integrating AR could enhance gameplay and differentiate the product.

I completed an online AR development course, built a small prototype using Unity’s AR Foundation, and presented a proof‑of‑concept where puzzles appeared on real‑world surfaces. I outlined required SDK updates, performance considerations, and monetization ideas.

Management approved a limited AR mode for the next update, leading to a 25% increase in user engagement and a feature highlight in the app store.

Our studio wanted to combine rhythm mechanics with a tactical RPG for a unique player experience.

Create a core loop that integrates timing‑based inputs with strategic decision‑making.

I started with player‑centered research, mapping emotional beats of rhythm games and decision points of RPGs. I prototyped a turn‑based system where each action required a timed input to succeed, using paper mock‑ups and Unity rapid prototypes. I iterated based on playtest feedback, balancing difficulty curves and reward pacing.

The final loop achieved a 4‑minute average session length with high replayability, and early user testing showed a 78% satisfaction rating for the blend of genres.

Our cross‑platform title needed to run on high‑end PC, mid‑range consoles, and low‑end mobile devices.

Establish a performance pipeline that catches bottlenecks early and adapts assets per platform.

I set up automated profiling builds for each target, integrated Unity’s Profiler with custom scripts to flag CPU/GPU spikes, and created asset bundles with platform‑specific LODs and texture compression. I also instituted a ‘performance budget’ checklist for designers, covering draw calls, shader complexity, and memory usage.

We stayed within 10% of the target frame budget on all platforms, reduced QA regression time by 30%, and shipped without major performance patches.