Fallout 4

Fallout 4 is a massive game. One could technically beat it way quicker than the 275 hours it took for me, but if you explore every single location and dabble in some settlement building, the hours start stacking up. This is the longest single playthrough of a game I've ever done by a good measure and will probably remain so for a good while. Maybe till Elder Scrolls VI?

Fallout: New Vegas

Fallout: New Vegas is yet another case of Obsidian Entertainment being commissioned to make a sequel to a game. It is also bit special in that because several of Obsidian's founders had worked on the original Fallout games. And maybe because of that, New Vegas is a whole lot better than Bethesda-developed Fallout 3 -- at least in my opinion.

Fallout 3

The setting of Fallout 3 is definitely not something that is to my liking -- a post-apocalypse nuclear wasteland does not sound particularly compelling. I have seen the game be praised on multiple occassions, however, and I ended up buying it myself -- about a year ago, it would seem. My previous and short-lived experience with the series was Fallout 2 where I got far enough to kill some scorpions (I think) before quiting because the game was not like Infinity Engine games I so love.