ÖZGÜRÇEBİ
Highway Racer Pro: a sports car on a highway through desert hills beside a passing train.

Istanbul

Unity Game Developer

I take games from an empty project to a live product and stay with them. Six years across mid-core, hybrid-casual and hyper-casual titles.

See the work View CV

Highway Racer Pro

Highway Racer Pro and Parking Master Multiplayer 2

The evidence

App StoreFeatured by Apple’s editors
App Store story artwork for Highway Racer Pro: a red sports car on a highway.
GAMES WE LOVE Life Is a Highway Hit the open road in radical races.
Apple’s App Store editors featured Highway Racer Pro in “Games We Love”.
  • #1 Racing in the US and 45+ countries at launch
  • 20M downloads of Highway Racer Pro
  • 4.7 out of 5 from 85K App Store ratings
  • #3 in Racing on the US App Store today Rating and chart position read from the App Store listing on 10 November 2026.

Spektra Games, 2023–2026

Selected work

Two live titles I built and operated, from first commit to millions of players.

Highway Racer Pro

Founding engineer on gameplay, physics and tooling

#1 Racing on the US App Store at launch in the US and 45+ countries, and the category’s most-downloaded title since. Featured by Apple in “Games We Love”.

Vehicle physicsAddressablesTraffic AINative plugins
Read details
Highway Racer Pro: A sports car approaching a red suspension bridge with a city skyline behind. Highway Racer Pro: A purple sports car drifting through a tree-lined mountain road. Highway Racer Pro: A purple car drifting on a German autobahn. Highway Racer Pro: A coastal road curving past a container port at sunset. Highway Racer Pro: A palm-lined coastal freeway with traffic and road signs.

Parking Master Multiplayer 2

Gameplay & performance engineering

A live open-world driving title with 30M downloads, where I built customization, events and game modes, and kept it smooth on low-end hardware.

Live opsCustomization systemsMemory optimization
Read details
  • Parking Master Multiplayer 2 screenshot
  • Parking Master Multiplayer 2 screenshot
  • Parking Master Multiplayer 2 screenshot
  • Parking Master Multiplayer 2 screenshot

Personal project, open source, 2026

Tileworlds

Tileworlds hub screen

Playable right here, without sound. Open it full screen for sound.

Four mobile puzzle games on Tileworks, a modular Unity framework I wrote on my own time to show how I design and write gameplay code. It is not a shipped product: no players, no metrics, and the art is AI-generated placeholder work.

  • Rules you can test without the engine. One deterministic rules engine runs Tile Match, Block Puzzle, Blast and Gem Swap.
  • Levels generated and measured, never guessed. A solver and bots play every level until it lands on its target win rate.
  • Rules run ahead, the view catches up. You can keep playing while pieces are still falling.
  • One transaction per level result. SQLite saves with DAOs, migrations, backup and restore.
  • Architecture rules as tests. About 940 test cases in all.
  • Tile Match, level 45
  • Block Puzzle, level 20
  • Blast, level 25
  • Gem Swap, level 40

Read the code

2020–2023

Earlier work

Mid-core multiplayer and metaverse projects at HoloNext and KobGames.

Robo Squad

Mid-core multiplayer battle royale. I built the character system, skills, spectate mode, minimap, kill feed, trophy and mission systems, matchmaking and AI, plus the client side of the game APIs.

Hunt Heroes

Mid-core co-op multiplayer with 15+ playable characters, each with a unique attack ability. I owned gameplay programming, real-time networking, AI, matchmaking and mission tracking, along with IAP, Play Store, Game Center and Facebook login integration and release.

Kitties Metaverse

A WebGL open-world metaverse built in Unity and Photon Quantum: 128 concurrent players per room, with 4000+ playable characters assembled at runtime from on-chain data. Players link a wallet, explore, chat and join PvP battles, on web and mobile.

27 solo titles

Hyper-casual

I developed these 27 solo at HoloNext and KobGames, on a modular gameplay codebase I built to stand prototypes up fast. Most have since been delisted. Pick one up and throw it.

Hover or grab an icon to see its name.

How I work

I build from modular architecture and its documentation outward, and automate what would otherwise be done by hand.

Six years on live mobile games, most recently as one of the first two engineers on Highway Racer Pro. I work across whatever the game needs.

GameplayPhysicsAINetworkingTooling

Looking for my next role

If you have something interesting, get in touch.

  • Nov 2023 – Sep 2026

    Spektra Games

    Highway Racer Pro, Parking Master Multiplayer 2

  • Aug 2022 – Aug 2023

    KobGames Studios

    Kitties Metaverse

  • Sep 2020 – Aug 2022

    HoloNext

    Hunt Heroes, Robo Squad

  • 2016 – 2021

    Yeditepe University

    BSc Computer Engineering

Behavior Tree vs. Finite State Machine AI in Shooter Games

Özgür Çebi
IEEE TUAC, 2021

IEEE TUAC, 2021

Academic research

I built a shooter environment to benchmark two AI architectures head to head across varying agent counts and maps, then presented the results at the IEEE TUAC conference.

Read the paper (PDF)

Cats on a sunset terrace by the sea.

Casino Mares

A little multiplayer game I made in my spare time: cats playing blackjack, roulette, poker and slots in a seaside casino. Everyone who drops in plays in the same room.

Up to 10 cats per room
Join the room