(adsbygoogle = window.adsbygoogle || []).push({}); This is my Twisted Metal save with warthog unlocked just resign to your name using Xploder.
I did not test if it will pop trophies..
But did confirm that it will unlock warthog for you.

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Enjoy!!

EDIT:
The story was beat in co-op.
The save will pop trophies just replay the last Level In co-op.
You'll get the - Beat Twisted And All Gold on Twisted trophies

Link... doesnt work :/

The link doesn't works