The conflict degenerating into civil war is everybody's nightmare scenario.

这场冲突恶化成内战成为每个人的恶梦。

"That is the nightmare scenario," he concluded.

“那会是一个噩梦般的场景。”他总结说。

For America, this is a nightmare scenario.

对美国而言，这将是噩梦。

In other words, a scary nightmare scenario turned into something "fun" for a gamer.

换句话说，可怕的噩梦轩变成了对于玩家“有意思”的事情。