How do you turn a game idea into reality?

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This time on Developing, I want to turn my game idea into reality. But, first, I need to explore my history of failed game-making attempts, to figure out where to begin.

=== Credits ===

Prototype Footage

It Takes Two - https://youtu.be/QbMF1nCiIkQ
Ori - https://www.youtube.com/watch?v=HTksBJeoa1A
Subnautica - https://www.youtube.com/watch?v=pwWkAxzXxeQ
Cuphead - https://twitter.com/StudioMDHR/status/1046082248573882370
Slay the Spire - https://www.youtube.com/watch?v=eLITSvCz2rk
Last of Us Part II - https://youtu.be/KW4JlxAEAE0
Fall Guys - https://www.youtube.com/watch?v=01ZBzHMvVCE
God of War - https://www.youtube.com/watch?v=lreYsdHT54w

Game Footage

Artwork - https://www.kenney.nl
Character Controller - https://pressstart.vip/tutorials/2019/10/15/104/perfect-jumping-in-unity.html

Music By: LAKEY INSPIRED @ https://soundcloud.com/lakeyinspired
License for commercial use: Creative Commons Attribution 3.0 Unported "Share Alike" (CC BY-SA 3.0) License.
YouTube Audio Library

=== Subtitles ===

Contribute translated subtitles - - https://amara.org/en-gb/videos/wEwExtiemjy0