The Epic Games Store has another big game to give away for the second week of its ongoing Mega Sale. Last week was Death Stranding and this week it's Fallout: New Vegas Ultimate Edition, the much-loved first-person RPG from Obsidian Entertainment. This is the first time Fallout: New Vegas has gone on the giveaway block, so if you don't already have it, don't miss it. It's up for grabs until June 1—after that, yet another mystery game will take its place.