来自官方网站
http://watchdogs.ubi.com/watchdogs/en-us/news/index.aspx
Watch Dogs PC Update
The dev team is completely dedicated to getting the most out of each
platform, so the notion that we would actively downgrade quality is contrary
to everything we’ve set out to achieve. We test and optimize our games for
each platform on which they’re released, striving for the best possible
quality. The PC version does indeed contain some old, unused render settings
that were deactivated for a variety of reasons, including possible impacts on
visual fidelity, stability, performance and overall gameplay quality. Modders
are usually creative and passionate players, and while we appreciate their
enthusiasm, the mod in question (which uses those old settings) subjectively
enhances the game’s visual fidelity in certain situations but also can have
various negative impacts. Those could range from performance issues, to
difficulty in reading the environment in order to appreciate the gameplay, to
potentially making the game less enjoyable or even unstable.
Thanks for playing Watch Dogs and stay safe on the mean streets of Chicago.
-The Watch Dogs Team
上面那一大串的大意:
开发小组呕心沥血的为了让你们在各个平台上都能玩到最佳体验，
任何怀疑我们把游戏体验品质降低的想法都是与事实相悖的。
我们在游戏释出的各个平台上进行过测试和最佳化，
PC 版本确实包含了部分旧的显示设定在里面，
基于一些理由所以没有把这些显示设定开放给你们使用。
模组师通常都是一些热情创意的玩家，
虽然官方欣赏他们的狂热，
不过这些(使用旧设定的)模组在特定情况下增进画质表现的同时亦可能带有副作用，
副作用包含影响效能表现，
乃至于环境细节不易分辨而损及游戏体验，
更甚者使得游戏性打折扣或影响游戏稳定性。
感谢你们玩 Watch Dogs，
在芝加哥充满恶毒巫术的街上小心一点。
精简版:
UBItch 表示我们把 PC 版的画质降低是为了让你们有更好的游戏体验