I just started the Railroad questline the other day and I was amazed at how much it looks like the Thieves Guild from Skyrim, hell, it is the Thieves Guild from Skyrim.
- They are a shadowy organization living in an underground hideout beneath a church (TG - Temple of Mara)
- They are a shadow of their former self after the Switchboard (TG - Ran out of Luck after Twilight Sepulcher)
- You help them rise back up (TG - Restore Glory quests)
- They have markings throught the world showing directions, caches, etc. (TG - Shadow markings)
- The armor is almost the same.
The only difference I found is that the Thieves Guild doesn't help wanabe Terminators.
100% spot on! Excellent connections between the two, I kind of wish that there were more "reconnaissance" missions in the RR. I always liked sneaking past enemies to rob them of something vs just killing everything, and the RR kind of forces you to be a Heavy vs a sneaky in and out person