Option 1
Product Management
Engineering
Marketing + Presales
Sales
Implementation and Support (Customer Success)
Option 2
Production
Research and Development (often abbreviated to R&D)
Purchasing
Marketing (including the selling function)
Human Resource Management
Accounting and Finance.
Option 3
Accounts and Finance
HR
Sales and marketing (Business development)
Infrastructures
Research and development
Learning and development
IT services
Product development
Admin department
Security and transport.
Option 4
Research and development
Quality Assurance
Sales and Marketing
Technical Publications and Training
Technical (or Customer) Support
HR
Accounting and Finance
Administration
Option 5 - AAA Studios
Production: Game Design + Producers
Marketing
Technical / Engineering
Art
Game Design (work in tandum with all departments)
C-Level: Business
Quality Assurance
External: Publisher
Option 6 - For AA Studios (Indie):
C-Level: Business
Hybrid: Game Design / Production / QA
Technical / Engineering
Art
Option 7
Studio Level Departments
IT & Technical Support
Q/A Testing.
Finance & Payroll
Top management / owners
Audio.
HR.
Outsource Management
Tool development
Studio-level Producers
Project Team Level Departments
Engineering
Art
Design
Team-level Producers
Option 8
Head of Studio
Producer/Manager/Director
Game Design
Artist
Programming
Testing (QA)
Audio
Really good slide:
https://www.slideshare.net/joanby/game-industry-first-approach-to-the-departments-of-a-video-games-studio
https://www.quora.com/What-are-the-different-departments-in-a-software-company
https://en.wikipedia.org/wiki/Software_house
https://en.wikipedia.org/wiki/Category:Video_game_development_companies
https://www.quora.com/How-many-departments-are-in-AAA-game-dev-studio
https://www.newcastle.edu.au/degrees-to-careers/job?id=146#jopt=tabsummary
https://www.quora.com/How-many-departments-are-in-AAA-game-dev-studio
https://en.wikipedia.org/wiki/Video_game_development
http://www.blitzgamesstudios.com/blitz_academy/game_dev/company_structure
http://creativeskillset.org/creative_industries/games/job_roles
https://www.all-computer-schools.com/computer-careers/video-game-design/game-design/
https://www.inc.com/zoe-henry/inc5000-2017-5-biggest-industries-revenue.html
https://www.quora.com/What-are-the-largest-Global-industries-by-revenue
https://www.gamasutra.com/view/feature/130989/team__corporate_structure_is_the_.php
http://au.ign.com/articles/2005/11/30/hierarchy-of-a-game-development-company
https://lukefollows11.wordpress.com/2013/09/20/organisational-structures-in-the-games-industry/
https://www.nyfa.edu/student-resources/forming-solid-indie-game-development-team/
https://www.slideshare.net/jcolebrook/the-game-industry-organisations