"Nvidia made us aware in advance of the GFN service, and that it would be available to Terraria owners (and really, all games on Steam) in the coming months, regardless of our involvement (or not)," Ted Murphy of Terraria developer Re-Logic told me over email. To clarify, I asked if Murphy believed Terraria would be available on GeForce Now regardless of Re-Logic's cooperation, and he said yes.
"That was how we interpreted what was being said, that GFN would be something that wove in with Steam—a new way for gamers that had already purchased a given game to be able to play… We didn’t really see an issue with that logic... and the agreement only covered the use of Terraria in marketing, etc. It did not get down into any other aspects or details, there was never any 'explicit permission' asked for in terms of the game being present on the platform."
Indie publisher Mike Rose tweeted about a similar interaction. I asked Nvidia for comment on whether the plan going forward is to add all games on Steam, but did not receive a reply. The big question is: Does Nvidia really need permission?
引用自PC Gamer：
https://www.pcgamer.com/the-cont ... orce-now-explained/解释一下PC Gamer上提到的观点
部分游戏与玩家采用EULA协议，这个协议禁止玩家销售游戏的副本，游戏账号，像暴雪的游戏就禁止云服务，禁止你将账号转移给别人。
而事实上GFN这个功能会让玩家变得可以绕过EULA或者游戏本身销售自己的游戏使用权，你租用GFN够久，你的账号再转租给别人，别人使用GFN玩游戏。
这会影响到他们对账号用户本身进行的限制（比如一些竞技游戏没办法针对用户行为进行封禁从而督促用户友好游戏等）
另外，如果GFN这个功能存在，转售已获得游戏许可的GFN账号会让其他玩家以更少的价格体验游戏，这也会影响游戏的销量。
现在云游戏的话主要还是两个方案，一种是在游戏内加入云游戏对应的SDK，然后上架云游戏商店。这类游戏的开发者一般只是开放这个功能，有的会做一些适配。
还有一种就是原生云游戏，从操作方案，游戏的内容，包括游戏一些判定条件都会直接兼容云游戏，降低玩家的体验成本。
GFN有种搅局的意思，只靠卖账号赚钱并不符合开发者的利益
暗黑3全程必须在线被骂成怎么样，云平台更别说