@bri L, that’s where the reading kicks in, i do believe i gave him some insight, but i’ll give in to your demands, here comes:
first of all, a team of creative directors gets together and brainstorms over ideas, this takes roughly a month (working it out), then, as they start working on assets and resources for the game, a team of coders starts working on the engine, or modifying an existing one to fulfill the needs of the game, this can take anywhere from a year to three years or more, the coders use the resources build by the creative team to implement into the game, resources include characters, levels, props, etc.ofcourse not everything will run smoothly so the coders will have to do some adjustments, and a lot of testing
at the same time an A/V team is creating the voices, sound effects and music, while another team can start working on the cutscenes using either the engine or an external video creation program using the games resources
after both devisions are done, it has to be fused together into a nice package, tested over and over, corrected over and over, around the same time the art team has made the box art, and if everyone is sure they did a good job the game “goes gold” meaning it’ll be printed, boxed, and shipped
this is usually done by a team consisting of around 50–100 in total, good luck…