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 1. Home
 2. Features


THE MOST CRUCIAL PART OF VIDEO-GAME DEVELOPMENT EXPLAINED - AND HOW IT POWERED
FORTNITE'S RUNAWAY SUCCESS

By OXM Staff published December 23, 2018

OXM speaks to the professionals about exactly what game engines are, which ones
they use, and how they work

 * 
 * 
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 * Comments

Page 1 of 2:
What are video game engines and what do they do?
 * What are video game engines and what do they do?
 * The most popular game engines and the titles they created



Frostbite, Unity, Unreal... we’ve all heard of the world's most popular game
engines and seen their logos in front of games such as PUBG, Firewatch and
Battlefield V. You've probably seen their jaw-dropping tech demos that highlight
advancements in lighting, animation, physics and particle effects. But what do
game engines actually do? They're the most crucial part of in-game development,
because until a team obtains or creates one, almost everything in the pipeline
is put on hold.

In this article, we're going to explore some of the myths around game engines
(and how complaints about 'lazy developers' are, well, lazy), why studios invest
so much resource creating their own tools, and outline the most popular software
tools in use today. "A game engine is a platform for your game to run on; to
load the world, place you in it, and accommodate your stay,” explains CD Projekt
Red’s tech team. “There are many kinds of engines. Depending on your game’s
requirements, each one will differ in how much work it actually does. They
render (display) the world, calculate physics, play sounds and more. Engines are
all the code that is not specific to your game and can potentially be reused in
a different title.”


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By having an engine that already has ways of handling things like rendering,
physics, lighting and artificial intelligence straight out of the box, it makes
creating character models and having them behave in a given way quickly
achievable. Such game engines allow development teams to focus on actually
making their games rather than having to essentially reinvent the wheel every
time they wish to do so. It’s also one of the main reasons why new developers
will opt for using engines that are readily available for free, such as Unity or
the Unreal Engine. 



They’re also designed to have a modular nature so that it makes it possible to
improve or adjust an engine’s functionality by employing additional software,
referred to as ‘middleware’. This type of software is designed to deal with
specific tasks - such as Audiokinetic’s audio engine, Wwise, or Nvidia’s PhysX
engine, which handles physics - that the original engine might not be able to
perform quite as well. There are even some software companies that will provide
an engine’s entire source code so that more advanced developers can directly
manipulate it to fit their needs. 





WHY DO DEVELOPERS BUILD THEIR OWN GAME ENGINES?



But sometimes, despite all the availability and flexibility of these engines,
developers will need to spend the extra time and money in designing their own,
like CD Projekt Red did for their REDengine. “Each game engine is tailored for a
specific experience,” explains the CD Projekt Red Tech team. “Our games focus on
creative storytelling in a living and breathing world, so we required an engine
and tools suited for these particular experiences. After careful consideration,
we arrived at the conclusion that third-party software wouldn’t cut it. It would
probably take longer to adjust a commercial engine to our needs than just make
our own from scratch. So that’s what we did.” Having an engine specifically
tailored to suit their games allows CDPR to have an unprecedented level of
control over every aspect of development so that they could accomplish any goal
they set. And having their designers in constant cooperation with the
programmers meant they were able to adapt the engine to better suit their
needs. 

RECOMMENDED VIDEOS FOR YOU...


However, as you can imagine, this isn’t a task for the faint-hearted. “Creating
your own engine requires a lot of work and a dedicated team of professionals,”
says CDPR. “A modern open-world engine is a big and complicated beast. Taming it
requires a lot of knowledge and experience. Moreover, before the core of your
engine is ready, gameplay systems cannot be built on top. So there’s a lot of
pressure and little luxury to polish one small element of the engine for an
extended period of time. Also, when we encounter an obstacle, we have no other
option than to rely on ourselves and fix it. No outside support is possible,
whereas for the commercially available engines out there it’s sometimes
offered.” 



> "I think the biggest misconception about game engines is that they are some
> sort of magical piece of software… that can make any game into a reality with
> just a few mouse clicks".
> 
> Zak Parrish, technical artist

Even those that have any idea of what a game engine is tend to oversimplify
their role, thinking they’re responsible for just one aspect of a game, like
graphics
or performance. This results in many misconceptions. “I think the biggest
misconception about game engines is that they are some sort of magical piece of
software powered by the blood of unicorns that can make any game into a reality
with just a few mouse clicks,” explains senior developer relations technical
artist, Zak Parrish. “The truth is that there’s no ‘Make Game’ button in Unreal
Engine and you will still have a lot of work to do to make your game into a
playable experience. Making games is a profession for the passionate.” But the
biggest misconception of all seems to be the belief that problems within a game,
like performance, frame rate and crashing, are the fault of the game engine,
when in fact this is almost never the case and is more likely a programming
problem. 


HOW THE UNREAL ENGINE WAS PIVOTAL TO FORTNITE'S SUCCESS



Possibly the most well known of all game engines is Epic Game’s Unreal Engine,
which was used to develop the immensely popular Fortnite and was apparently
pivotal to its success. “Fortnite has been a labour of love at Epic,” says
Parrish. “We’ve worked on it for a long time to turn it into the game it is
today. Every part of that process – every refactor, every overhaul of a major
system, every outright replacement of a series of game mechanics – was only
possible due to the flexibility afforded by Unreal Engine. 

“The result is a game that serves as a solid platform upon which we can
continuously expand and build,” continues Parrish. “Every key aspect that is
Fortnite: the robust and evolving Save the World experience, new game modes such
as battle royale that didn’t exist at early access launch, the release of the
game on every conceivable platform from high-end PC to console all the way to
mobile devices, even the ability to keep new content rolling for players at a
virtually constant pace, every part of that development process has been powered
and streamlined by Unreal Engine.” 


CAN GAME ENGINES ALLOW ANYONE TO MAKE A GAME?



There are now plenty of game engines available for free, some of which you’ll
see on the next page in our rundown of some of the most popular developer
software, so if you’re interested in venturing into the world of game
development and creating your very own Fortnite, here’s some parting advice:
“Don’t wait, don’t make excuses; just go make a game,” says Parrish. “Honestly,
my first bit of advice for aspiring devs right now is to fully grasp that there
has never been a better time to learn game development. If you’re new to the
game dev world, you probably have no idea that you’re in a real golden age right
now. You have so much technology and opportunity at your fingertips: free game
engines like Unreal, free 3D apps, free 2D apps, tons of free training on how to
do things... I look back at when I was first learning this stuff and I’m
floored. 

“There’s really nothing stopping an aspiring developer right now from just
making a game and shipping it,” Parrish continues. “Sure, if you’re by yourself
you have to limit your scope a bit, but if you want shipping experience - the
exact experience studios care about - you can build a game and launch it on just
about any platform these days, all without much, or any, money out of your own
pocket. And from tools to source code to tons of training content, Epic Games
and Unreal Engine are behind you all the way. 

Which game engines powered the biggest games of 2018? We've got all the answers
on the next page.

 * 1
 * 2

Current page: What are video game engines and what do they do?

Next Page The most popular game engines and the titles they created
OXM Staff
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