Many of these games only took a few months to create, so developers could release multiple titles per year.
Thus, publishers could often be generous with benefits, such as royalties on the games sold.
The game industry employs those experienced in other traditional businesses, but some have experience tailored to the game industry.
Some of the disciplines specific to the game industry include: game programmer, game designer, level designer, game producer, game artist and game tester.
Many early publicly-available interactive computer-based game machines used or other mechanisms to mimic a display; while technically not "video games", they had elements of interactivity between the player and the machine. and Estle Ray Mann filed a patent for a "cathode ray tube amusement device".
Technologies such as Smartphones, virtual reality and augmented reality are major drivers for game hardware and gameplay development.
Though maturing, the video game industry was still very volatile, with third-party video game developers quickly cropping up, and just as quickly, going out of business.
Most of these professionals are employed by video game developers or video game publishers.
However, many hobbyists also produce computer games and sell them commercially.