This might just be one of the best custom video game modification I've ever seen! Modder SeedyROM34 took Grand Theft Auto IV, and gave it an incredibly badass Back to the Future customization. He threw in Marty McFly and a great looking Delorean that has the ability to travel back in time in the game, based on time circuits and the possession of plutonium. It's funny seeing McFly holding an automatic weapon and shooting at cops from inside the Delorean.
Unfortunately you wont be able to download the Mod, but here's a note from the creator...
There is no single "Download Link" for this mod. It's a HEAVILY CUSTOMIZED PC project from a die-hard BTTF and GTA fan. It took me months to tweak everything and finally get it working right but I couldn't have done it without the help of some truly great mod makers (credits/links below). Please don't just start modifying your game without researching and backing things up first. You WILL break it.
I made this video mostly to show what can still be done with this amazing game and to give other BTTF fans some information on how to create something similar, though not exact. I'll answer simple questions but I can't train you on how to mod GTA...you'll have to do some research yourself, if you're up to it! It's a hell of a lot more than just installing a skin or two...we're talking hours and hours of editing files. I've only played with it for a few hours now but it was totally worth it.
I wish I could play this! SeedyROM34 did a fantastic job developing it, and it's definitely one of the coolest things I've seen all day. Enjoy the video presentation!