Command And Conquer: Tiberium Wars
The Keith DeCandido novelization of Command and Conquer: Tiberium Wars was widely denounced upon release. I was there on Spacebattles, and I saw the critiques. I read it, and I agreed.
If the book itself was in an original setting, it would be forgettable and bland, a spacesuit commando Marine Force One with a Mary Sue protagonist. The only real quibble would be extremely rapid procurement of new rifles. But as it stands, it doesn’t gel well with the Command and Conquer game. At all.
There might be a mitigating factor in that I’ve also heard that DeCandido got background material for “Tiberium”, the cancelled C&C FPS project and based the book of of that, which would explain some things like the abundance of rifles. However, whatever the circumstances, this is a book to avoid.