From there it would be simple to aim public support at a 'free the blockchain' campaign, ie temporarily up the transaction fee in the client and ask every gamer to take part and get a good reward for doing so.
The blockchain can be hijacked and held for ransom but it can't be manipulated without the users consent.
I think you're skipping ahead too many steps. Allow me to fill in the gaps:
1) The CEO or some other "big picture" guy catches wind of Bitcoin at some humanitarian fundraiser.
2) The boss dials some other manager, and the manager says "I'll get my algo boys to look into it".
3) The algo guys start researching Bitcoin and they're like, "this is freakin' awesome!! And they want us to break it?"
4) After many months of SFA happening while they hire consultants who tell them to hire VHDL designers and set up a front-company... the algo guys are all doing GPU mining on graphics cards they stole from work, the big boss forgot about it, and the manager mysteriously lost 80,000BTC that he bought using funds for the front-company.
LOL how would the company even know the consultant simply copied the wallet.dat onto a usb drive ?