There are two factions, groups that license a third party engine and mainly work on the game content and groups that work on an in-house engine and on game cont

There are two factions, groups that license a third party engine and mainly work on the game content and groups that work on an in-house engine and on game content. If you want to make a game that stands out you are generally better of with an in-house engine. Otherwise you have to make compromises and do it a specific way that may hurt the end result. Most Unity and Unreal 1-3 engine based games can be identified as such literally from 50 feets away. In-house engines have downsides as well, and some hobby projects never advance to the gameplay content creation stage.