Mad - Games Tycoon 2

: Build a Research Room and hire staff with research skills.

To include a feature in your game, you must first research it: Mad Games Tycoon 2

During the development process, you will reach a screen to select features: : Build a Research Room and hire staff with research skills

If you mean "producing" physical copies for sale (Self-Publishing), this requires a separate : Mad Games Tycoon 2

: If you omit required features (like modern sound or graphics) after a certain year, your game will receive a review score penalty (typically -1% per missing feature). Production (Physical Copies)