Unreal Engine 4 will, no doubt, power many next-generation video games in the coming years, including those that come out of Epic Games. The first game to use the studio’s new engine technology, however, will be the previously mysterious Fortnite.

We already knew Fortnite was influenced by Minecraft, but what was shown at a panel today in San Diego for Comic-Con sounds like a much more ambitious take on something like the Zombies mode in Call of Duty.

Epic Games is describing Fortnite as a "co-op sandbox survival game." Players spend the day building defenses and crafting items, weapons to defend against enemies at night.

At the moment, Fortnite is shipping on PC sometime in 2013, but designer Cliff Bleszinski has already said that doesn’t mean it’s a PC exclusive forever.

“Fortnite is PC primary and first, but we wouldn't rule out the possibility of other platforms later,” he said on Twitter.