A game designer is responsible for mapping out and guiding the development of a game. The typical process begins with creating a concept and game design document that outlines the entire game. Designers are expected to fulfill multiple roles such as pitching new game ideas, providing detailed designs, ensuring high quality, and designing various elements like worlds, systems, content, levels, interfaces, and audio. Their goal is to collaborate with other teams to bring their vision for the game to life.

1. Game
Designer
A
game
designer
has
many
responsibilities
with
a
game
they
are
making.
The
Process:
The
“textbook”
approach
is
to
start
with
a
concept
and
create
a
game
design
document
which
is
intended
to
show
the
entire
game
design
mapped
out
to
give
direction
to
the
development
team.
Designers
usually
adapt
to
multiple
roles.
When
discussing
a
new
project
they
may
be
expected
to
create
a
pitch
of
ideas
for
the
game.
If
the
pitch
is
approved
the
designer
may
be
expected
to
give
a
more
detailed
design
document.
As
the
production
progresses
more
input
is
expected.
Near
the
end
of
production
the
designer
must
make
sure
every
part
of
the
game
is
of
a
high
standard.
The
following
are
what
a
game
designer
is
responsible
for:
World design
• a backstory
• a setting
• a theme for the game; often done by a lead designer
System design
• game rules
• brainstorming and formulating the core ideas for the system
• understanding the gameplay and story goals, and how the system
can help embellish on them
• scripting the basic interface and system logic
• working with and communicate the design goals clearly with other
disciplines and collaborate and incorporate other disciplines into
the creation process
• working in our proprietary design tools to place necessary objects,
triggers, and scripted logic to fire off events in the gameplay flow
• bug checking
Content design
• characters
• items
• puzzles
• missions

2. • progression & unlocks
• the online user experience (if applicable)
Game writing
• dialogue
• text
• story
Level design
• world levels and its features
• level layout
• setup and tuning of levels from high concept to object placement
and scripting
• working directly with artists, programmers, animators and other
game designers to contribute
to the vision of the game
User interface designer
• user interactions and
feedback interface like
menus or heads-up displays.
Audio design
• creating or incorporating all
of the sounds that are in the game, like sound effects or voice
References:
http://www.naughtydog.com/site/careers/
http://en.wikipedia.org/wiki/Game_design