Underrail is a good game that you should play (but it's hard)
Dead Money, a DLC for New Vegas, has a character which, if you refuse to talk to him, kills you instantly.
Who are the other writers?
Elijah, a character who somehow didn't get killed by the BoS despite painting a huge target on their back to the NCR and breaking protocol constantly
Elijah, who is so amazing of a character he gets his own DLC, if you call him pretentious, he kills you kills you.
During development Chris had a lot of control over Obsidian, but he later fucked off to do his own thing writing Ulysses (an obvious author avatar) for FNV, and you'll notice that, base FNV, which had little to no influence from Chris, was far less grimdark and pretentious than usual.
Then the layoffs happened. and he was back in control of the DLCs.
Remember Ulysses? He gets his own DLC.and Chris very kindly wrote a backstory for you, something every other writer avoided doing.
"You blew it up!" (No I don't have proof)
"According to Chris Avellone, the original NCR-Brotherhood war would have been far more tragic than it is in the finished version. Originally, the NCR mistakenly believed that the Brotherhood and the Enclave were one and the same because due to their shared use of advanced pre-war technology. When the actual Enclave nuked San Francisco in revenge for the Oil Rig, the NCR would retaliate against the Brotherhood believing that they were responsible, thus setting off the conflict."
This was taken from Van Buren, he wanted to Nuke San Fran. Why? He hated the Shi.
Eventually, he was told no, by Bethesda themselves.
His role in Fallout is grossly overstated, he spent most of his time in 2 dicking around with New Reno, he tried peddling the Fallout Bible, Van Buren notes are a mess, he did shit for New Vegas besides Cassidy and the DLCs.
The other writers hated Chris and I see no reason to like him.