If you had a large team and set out to build a major game, how would production begin? What are the first practical steps, both creatively and technically, that take a project from a blank slate to an early playable alpha? I once made a small game for a school project and found it surprisingly overwhelming to move from brainstorming mechanics to actually building the foundation. I imagine that challenge is much greater for a huge production. Specifically, what do programmers and other teams start working on first, and how do they gradually turn the initial idea into a functioning game?
4 Answers
Programming normally begins with a small playable prototype or vertical-slice target rather than the entire game. Gameplay programmers might implement input, movement, camera behavior, and one simple interaction, while engine and tools teams work on rendering, asset importing, builds, debugging, and other foundations. The goal is to prove that the central loop is fun and technically feasible before producing thousands of assets.
The project usually starts with a clear vision, a high-level design document, and some early prototypes. Writers and designers establish the concept, goals, core gameplay loop, and scope while artists explore the visual direction with concept art. At the same time, technical leads decide whether to use an existing engine or internal technology and define the project structure and tools.
The exact order depends on the type of game. A sports title, an open-world game, and a heavily online project will all validate different things first.
AAA development is also a production and business process. Before a large team is assembled, the studio needs a budget, schedule, target platforms, audience, and a realistic scope. Teams prototype new mechanics, reuse or improve technology from earlier projects where appropriate, and test constantly. More people do not automatically make development faster, so communication, ownership, and manageable milestones are just as important as the code.
Once the prototype is promising, teams create a vertical slice: a small section that demonstrates the intended gameplay, art quality, audio, interface, and technical performance. It is not the whole game, but it gives everyone a concrete target. After that, the work is divided among specialized teams for levels, characters, missions, systems, audio, online features, platform support, and quality assurance, all connected through shared tools and regular builds.

Using an established engine can make this much easier for a small team. You can focus on gameplay instead of first writing your own renderer, memory systems, editor, and asset pipeline.