I think it's fairly obvious a couple of reasons why not, but I'm not going to go into them here. When all people mean (far as I can tell) are 'is it possible for Unity to be used to make something on the level of what typically comes out of Ubisoft, Activision, Bethesda, Bungie, Naughty Dog etc'. These discussions all devolve into some semantic argument, where the property of AAA-ness has an ability to retroactively cross time and space in a quantum fashion. OK but seriously, I think there's some 'knowing confusion' about what AAA means in terms of how it's used on the forums. This is convenient for me since in the absence of anything except the box, I can only judge the graphics of the game, so therefore beautyful graphics = AAA. To me, AAA means any game that fits the stereotype of what sits on the New Release shelf of my local EB Games store. It's just a matter of who is using it and what is driving their choices. Unity can and has been used for larger-scale projects. Unity's place in the market is more defined by market pressures than technical limitations. Many of the advantages that Unity provides make it a good choice for such efforts. Even major developers will forego their in-house efforts for such projects, and stick to Unity instead.

(see the Hearthstone and Fallout: Shelter examples) For smaller-scale projects with mobile platforms as the target, the need for a proprietary in-house engine is considerably lower. However, this approach also relies heavily on having significant and permanent in-house programmers to work on the maintaining and improving the in-house engine.Įngines like Unity are frequently used when projects are low to mid-scale, even by major developers and publishers. There is definitely merit to this approach, and certain advantages. This is usually so that they have sole control over their own technology, and have the freedom to customize that technology as needed, without having to rely on outside sources for changes. A decent number of large-scale developers and publishers frequently use their own in-house engines.

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