In case you haven't played Fallout 4 yet, the PC version of the game is on sale for $29. When NVIDIA's Fallout 4 mod is released, you can grab it from for free. They've become a congregation that embraces the darkness and sickness, and they've done it – so they believe – to survive. It's certainly taken its toll on its occupants. And it's a Fallout vault like you've never seen before. This is a big mod – equal in size to the other vaults spread across the commonwealth – with its own brand new questline. Tunnels that are, inevitably, full of twisted dangers. Once in you find the entrance to Vault 1080 and its dark, intimidating tunnels.

It's a dark and ominous journey before you even head below ground, as you travel to the ruins of a fog-shrouded church through hostile marshland. NVIDIA adds that the side-mission in the Vault 1080 mod is pretty creepy, too: You'll also see those lovely godrays whenever you do find the sun, plus weapon debris and new meshes and materials. This is thanks to HBAO+ and its control of ambient occlusion, which creates authentic depths anywhere a light source is blocked, no matter how small or fleeting.

Volumetric lighting features extensively – in ways not seen in the standard game – while shadows are more realistic and velvety than ever. The blog describes some of the more advanced graphical features in Vault 1080: Bethesda games in particular, with their massive worlds and wide breadth of things to do and see, are ripe for the modding. Whether it's a basic survival mod, combat tweaks, or changes to the user interface, players can customize the level of depth and immersion they'd like to get out. With only a handful of mods, gamers can transform Fallout 4's vanilla base game mechanics into something truly engaging. The inability to pause the game while in a menu means that players are always vulnerable to whatever is lurking in the shadows at that particular moment. RELATED: Fallout 4's 10 Best Environmental Add-On Mods To Date.

The mod was created by NVIDIA's in-house Lightspeed Studios. For decades, mods have granted PC gamers the freedom to tweak, change, and improve their experiences. When combined with other horror mods that add a lot of tension and fear to Fallout 4, this mod can be the icing on the cake.

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