Are Godot's official demo projects a good place to start?

They are small, readable and maintained alongside the engine, which makes them excellent for learning. They are demonstrations of engine features rather than skeletons meant to be grown into products, so expect to outgrow one rather than build on it forever.

Do I need 3D art before a 3D template is useful?

You need something. Some starters ship usable models, and a grey blockout is genuinely fine for weeks of work on movement and layout. But at some point the look of the game is the game, and that content has to come from somewhere.

Is 3D much harder than 2D in Godot?

The engine is not the hard part. The hard part is that everything takes longer to author: a level, an animation, a collision shape, a lighting pass. Systems work is comparable. Content work is several times more expensive.

What should I check before downloading a 3D template?

Which Godot version it targets, when it was last updated, whether it runs before you change anything, and whether the value you most want to change is easy to find. That last check tells you more than the feature list does.

Does Stage Engine include a 3D template library?

No. There is no template picker in the app and you cannot open these projects from inside it. Stage Engine is the other approach, where you build the world yourself and Director 1 writes the code.

Godot 3D game templates and the work they do not remove

Most Godot 3D starters are a character, a camera and a room. That is a real head start on the systems and almost none on the game, because in 3D the expensive part is the space you build.

Three different things call themselves a 3D template

The first kind is a movement base. Godot4 Basic3DStarter is the clearest example: a third-person character controller, a follow camera, a lit world scene, an animation script and a grid material for blocking things out. It has no objective, no collectibles, no enemies and no checkpoints, and that is deliberate. What it saves you is writing a controller from nothing.

The second kind is a small finished game. Godot's own Squash the Creeps demo is one: a player who moves and jumps, creeps that spawn at the edges, scoring when you land on one, a score label, music and a lose-and-restart flow. You can read all of it, and the loop works before you touch anything.

The third kind is a systems-heavy genre template, and it is a different animal. The Godot 4 souls-like template from catprisbrey carries lock-on targeting, stamina, dodge, block and parry, an equipment and inventory system, enemy AI states and a castle demo level. Godot Open RTS carries unit selection, resource collection, a production queue, a minimap and fog of war. A tactical role-playing template carries tile highlighting and turn-based actions.

Knowing which of the three you have downloaded is the first useful thing you can do, because they fail you in completely different ways. A movement base leaves you everything. A systems template gives you a lot and asks you to understand it before you can change any of it.

In 3D the cost moves into space and art

In 2D you can draw a room. In 3D a room is geometry, collision, lighting and navigation mesh, and it has to be walkable at your character's exact speed and jump height. Change the jump height late and the level you built stops fitting.

A few starters do hand you usable world content. Kenney's racing kit includes reusable track pieces, and Godot's Truck Town demo gives you a physics-driven town to drive around in. Those are the exception. Most 3D starters give you a grey blockout and the expectation that you supply the rest, which means either making models, buying them or generating them.

Performance also becomes a design constraint far earlier than it does in 2D. Draw calls, shadow-casting lights, terrain resolution and the number of things simulating at once all show up as decisions about your game rather than as an optimisation pass at the end.

The camera and the controller are what you will fight

Every 3D starter picks a camera style and builds around it. Third-person projects like the racing kits and the souls-like template need a spring arm that handles walls, framing that keeps the character readable, and a sensitivity that feels right on both a stick and a mouse. Top-down projects like the city builder kit and the real-time strategy template need edge scrolling, zoom limits and click-to-world raycasting. First-person projects need none of that and a lot of other things.

The controller is where the starter's opinions are densest. Whether movement is driven by code or by root motion on an animation, whether attacks live in an animation tree state machine, whether gravity is a constant or a curve. In the souls-like template the attack flow is expressed through an animation tree, which is a good design and also means changing an attack is a job of understanding, not typing.

Scale is the sneaky one. A starter that treats one unit as one metre and one that does not will feel entirely different with identical code, and mixing assets built to different scales is a persistent low-grade tax.

Reading a 3D project is a bigger commitment

Starting from someone else's project always means reading their code. In 3D that sentence has more weight behind it, because the systems-heavy templates are thousands of lines plus a scene structure that carries as much logic as the scripts do.

A reasonable way to judge one in an afternoon: run it before you read it, then pick one thing you know you will want to change, and change it. Make the player faster. Add a second enemy. Make one weapon do more damage. If you can do that inside twenty minutes you have found a project you can live in. If you cannot find where the value lives, that template is not a shortcut for you, however impressive its feature list looks.

The other check is upkeep. A 3D template written for Godot 3 is a porting project. One that has not been touched in two years may still be fine, but you are now the maintainer of everything in it.

The other route: build the world, have the code written

Stage Engine starts from the opposite side. Rather than adopting a finished 3D project, you build the world by hand in the builder, placing terrain, water, weather and buildings yourself, and Director 1 writes the GDScript that makes it a game inside your own project. There is no template picker in Stage Engine and none of the projects on this page can be opened from inside the app.

It is a desktop app for Mac and Windows with Godot bundled in, so a 3D world runs locally at your machine's framerate rather than through a browser or a stream. Building needs an internet connection; playing what you built does not. The download is free, Indie is $10 a month and Pro is $50, and the paid plans buy more usage rather than a different engine.

Questions

Are Godot's official demo projects a good place to start?: They are small, readable and maintained alongside the engine, which makes them excellent for learning. They are demonstrations of engine features rather than skeletons meant to be grown into products, so expect to outgrow one rather than build on it forever.
Do I need 3D art before a 3D template is useful?: You need something. Some starters ship usable models, and a grey blockout is genuinely fine for weeks of work on movement and layout. But at some point the look of the game is the game, and that content has to come from somewhere.
Is 3D much harder than 2D in Godot?: The engine is not the hard part. The hard part is that everything takes longer to author: a level, an animation, a collision shape, a lighting pass. Systems work is comparable. Content work is several times more expensive.
What should I check before downloading a 3D template?: Which Godot version it targets, when it was last updated, whether it runs before you change anything, and whether the value you most want to change is easy to find. That last check tells you more than the feature list does.
Does Stage Engine include a 3D template library?: No. There is no template picker in the app and you cannot open these projects from inside it. Stage Engine is the other approach, where you build the world yourself and Director 1 writes the code.