You need a game engine, a plan for what you're making, and time to learn the tools

Building a video game starts with picking a game engine — the software that handles graphics, sound, physics, and player input. The two most common free options are Unity and Unreal Engine. Unity uses C# as its programming language and runs on Windows, Mac, and Linux. Unreal Engine uses C++ and is heavier on your computer but produces more detailed graphics. For 2D games, Godot is lighter and open-source. For absolute beginners, Scratch or Construct 3 let you build games by dragging blocks instead of writing code.

After you pick an engine, you decide what kind of game you're making — a platformer, puzzle game, top-down shooter, or something else. That decision shapes what you need to learn and how long the project takes. A simple platformer might take a few weeks if you're working part-time. A game with story, multiple levels, and polished sound can take months or years, even for experienced developers.

The actual work breaks into four overlapping parts: programming (making the game respond to player input and follow rules), art (creating or finding graphics and animations), sound (music and effects), and level design (building the spaces players move through). You don't have to do all of these yourself — you can download free art from sites like OpenGameArt or itch.io, or use royalty-free music from Incompetech or Freepd. But you do need to understand how each piece fits together.

Key Takeaways

  • Unity and Unreal Engine are the most widely used free game engines; Unity is easier for beginners, Unreal produces higher-quality graphics.
  • You must learn the engine's programming language (C# for Unity, C++ for Unreal) or use a visual scripting system to make the game respond to player actions.
  • You can download free art and music from OpenGameArt, itch.io, Incompetech, and Freepd instead of creating everything yourself.
  • Start with a small project — a single level, a short puzzle game, or a simple platformer — to learn the workflow before attempting something larger.

Choosing a game engine that matches your skill level

If you've never programmed before, start with Godot or Construct 3. Godot is free and open-source; Construct 3 is free to use but charges for export to certain platforms. Both let you build games without writing traditional code. Godot uses a visual scripting system called GDScript that reads almost like English. Construct 3 uses a drag-and-drop event system where you say "when the player presses jump, move the character up."

If you're comfortable with programming or willing to learn it, Unity is the industry standard. It's free to download and use until your game makes $1 million in revenue. Unity has the largest community, the most tutorials on YouTube, and the easiest path to publishing on mobile phones, consoles, and PC. You write code in C#, which is simpler than C++ and used in many other industries, so the skill transfers.

Unreal Engine is the other major choice. It's also free until you make $1 million. Unreal produces more detailed graphics out of the box and is what studios use for AAA games. The trade-off is that C++ is harder to learn, and Unreal's interface is more complex. If you want to work in the game industry later, experience with Unreal looks good on a resume, but it's not the best starting point for a first project.

Learning the engine through a small first project

Don't start by trying to build the game you really want to make. Start by building something so small you can finish it in two to four weeks. A good first project is a single-level platformer where you move a character left and right, jump over obstacles, and reach a goal. Or a simple puzzle game where you click tiles to match colors. Or a top-down shooter where you move around and fire at enemies that spawn in waves.

Every game engine has official tutorials. For Unity, start with the "Microgame" templates — these are pre-built small games you can modify and learn from. For Unreal, the "First Person Shooter" template walks you through the same concepts. For Godot, the official documentation has a "Your First Game" tutorial that builds a simple 2D game from scratch. Follow one of these tutorials completely, even if you don't understand every line. The goal is to see how the pieces connect: how you write code that runs when the player presses a button, how you move objects on screen, how you detect when two things collide.

As you follow the tutorial, change small things. If the tutorial character moves at speed 5, try speed 10 and see what happens. If the tutorial has one enemy, add three. If the jump height is 10, make it 20. These small experiments teach you how the engine responds without requiring you to build something from nothing.

Writing code that makes the game respond to player input

The core of any game is a loop that runs 60 times per second (or more). Each loop, the engine checks what buttons the player pressed, moves objects based on those inputs and the game's rules, checks for collisions, and draws everything on screen. Your job is to write the code that says "if the player pressed the jump button and the character is on the ground, move the character up."

In Unity, you write this in a script — a text file with C# code. You attach the script to a game object (like your character), and the engine runs that script every frame. The script has functions like Update(), which runs once per frame, and OnCollisionEnter(), which runs when two objects touch. You write code inside these functions to describe what happens.

In Unreal, you do the same thing with C++ code or with Blueprints, which is a visual system where you connect nodes instead of typing. In Godot, you write GDScript, which is similar to Python and often feels more readable than C#. The concepts are identical across all engines: listen for input, change the game state, and let the engine draw the result.

You don't need to memorize the code. You need to understand the pattern: input → logic → output. When you get stuck, you search for "how to [thing] in [engine name]" on YouTube or in the engine's documentation. Every beginner does this. It's not cheating; it's how professional developers work too.

Finding or creating art and sound without starting from zero

OpenGameArt.org has thousands of free 2D and 3D graphics, animations, and tilesets. Itch.io has game assets organized by category — search "free platformer tileset" or "free character sprite" and filter by license. Kenney.nl specializes in simple, clean game art that works well for beginners. All of these are legal to use in your game as long as you follow the license — most require you to credit the artist in your game or in a readme file.

For music and sound effects, Incompetech.com and Freepd.com have royalty-free music you can download and use. Freesound.org has sound effects. Again, check the license — most require a credit in your game or in a readme file you include with your download.

If you want to create your own art, Aseprite is the standard tool for pixel art (it costs $20 but has a free trial). Krita is free and works for digital painting. For 3D models, Blender is free and powerful but has a steep learning curve. For a first project, use free assets from the sources above. You can learn art later.

Building levels and testing as you go

In your game engine, a level is a scene — a file that contains all the objects, art, and rules for one playable area. You build a level by dragging objects into the scene and positioning them. In Unity, you drag a tileset (a grid of ground tiles) into the scene, then place platforms, enemies, and collectibles on top. In Unreal, you do the same with a landscape or static meshes. In Godot, you build a scene tree where each object is a node with properties.

As you build, play the level constantly. Press the play button in the engine, try to move your character, jump, and interact with objects. If something doesn't work — the character falls through the ground, the enemy doesn't move, the door doesn't open — you see it immediately and can fix it. This is called iteration, and it's how all games are made. You build a little, test a little, fix a little, and repeat.

For your first project, one level is enough. Make it about 30 seconds to 2 minutes long to play through. If the level is too long, it takes too long to test every change. If it's too short, there's nothing to learn from building it.

Publishing your game so others can play it

Once your game is finished, you can share it on itch.io, which is free and designed for indie games. You upload your game file, write a description, add a screenshot or video, and set it to public. People can download it and play it on their computer. You can also charge money if you want, but most first projects are free.

If you want to publish on mobile (iPhone or Android), the process is more complex. Apple and Google both charge fees ($99 per year for Apple, $25 one-time for Google) and require you to follow their guidelines. For a first project, publishing on itch.io is simpler and reaches plenty of players.

Before you publish, test your game on another computer if you can. Ask a friend to play it and watch where they get stuck or confused. Fix the most obvious problems. You don't need it to be perfect — your first game will have bugs and rough edges, and that's normal. The point is to finish something, ship it, and learn what you'd do differently next time.

Frequently Asked Questions

Do I need to know how to program before I start?

No. Godot and Construct 3 let you build games without traditional programming. If you choose Unity or Unreal, you'll need to learn C# or C++, but you can learn both through the engine's tutorials. Many people learn programming by building games rather than learning programming first.

How long does it take to build a simple game?

A single-level platformer or puzzle game takes two to four weeks if you're working part-time and following tutorials. A game with multiple levels, a story, and polished sound takes months. The time depends on how much you already know and how much art and sound you create yourself versus download.

Can I build a game on a laptop or do I need a gaming PC?

A laptop is fine. Unity, Godot, and Construct 3 run on any modern computer. Unreal is heavier and works better on a computer with at least 8GB of RAM, but it still runs on laptops. You don't need a gaming PC to develop games, only to run them smoothly.

What if I get stuck and don't know how to fix a problem?

Search YouTube for "[engine name] how to [thing]" or check the engine's official documentation. The game development community is large and helpful — most problems you run into, someone has already solved and posted about. Discord servers for each engine have active communities where you can ask questions.

Can I sell a game I made with free assets from itch.io?

Yes, as long as you follow the asset's license. Most free assets allow commercial use as long as you credit the artist. Read the license for each asset before you use it. If an asset says "for non-commercial use only," you can't sell a game that uses it.