Bethesda game studios has once again whet fans' appetites, unveiling four new pieces of concept art for their highly anticipated role-playing epic Fallout 4. The four pieces were unveiled on the company's official Twitter page to plug the upcoming 'Art of Fallout 4' book that launches on December 22, 2015.

The images give gamers a taste of what to expect from the latest installment in the Fallout franchise. Two of the images show off what appears to be a 'Terminator' like synthetic human skeleton, possibly hinting at some advanced cyborg characters in the game.

Another image features concept art of Fallout 4's Boston setting while the last is a shot of the series' iconic 'Power Armor' suit.

Fallout 4 is, without question, the most highly anticipated release in a crowded Holiday calendar filled with big names like Tomb Raider, Assassin's Creed, and Halo.

Pete Hines, Bethesda's Marketing Head, told MCV that the game is arguably the biggest in the company's illustrious history:

"I think this can top Skyrim," Hines tells the website. "It could be our biggest release ever. But we will see. It is part of my job to build the megaphone that we hold up to the game, and the game decides how loud it goes. Just how big it is going to be is hard to say. Skyrim was a massively big deal."

The game is hitting all the right notes so far. It stole the show at the Electronic Entertainment Expo in June with an impressive gameplay demo showing off its robust character creation tools, overhauled dialogue and crafting systems, and improved graphics and gameplay.

Its special limited edition, which features a working 'pip-boy' device like the one in the game, has topped Amazon's charts and is sold out everywhere.

Will all this hype translate into a big success for Bethesda? We'll have to wait until November 10 to find out.