[Cacophanus]

The events aren't random though, their are always specific triggers. Lots of mecha games seem to do this; as in when you doing well changing the gameplay path to one of sheer adversity. Armored Core does it all the fucking time.

Silent Line has a few mission which cap you in the balls just when you think you're doing well. Naturally, a lot of the juicier parts are unlocked that way.
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