Yes, I&#x27;m aware of the AAA exceptions. Source, CryEngine and Unreal Engine were around since long before Unity. They represent an extreme minority of games. <i>Obviously</i> the concept of game engines is older than Unity, I didn&#x27;t think I needed to explain that here...<p>And even then, CryEngine, Unreal and Source are all engines centered on a very specific kind of game (fps style). There was no <i>serious</i> general-purpose game engine before that, that devs actually used.