Kickstarter right now (Lush Green and Shining Yellow). I'm a relative newcomer to the Railroad Ink game, playing Deep Blue with my family during the winter and getting Blazing Red for my birthday in April. In my review I'm going to talk about both games as the base dice are the same and it's just the expansion dice in each version that are different. I'll talk about those separately.
Railroad Ink is a perfect game for solo players or for those who like to do their own thing and not affect or alter what anyone else is doing. Each player is basically building their own railroad tracks and roads without interfering with each other. I believe the current Kickstarter versions do have more player interaction, but these first two do not. In the game you roll four dice (or six, adding two of the expansion dice) and draw the roads and railways pictured (you must include all four dice on each round - the expansion dice have different rules depending on the scenario). Your goal is to connect the exit arrows on the side of the boards to each other. The more of these you connect, the more points you score! You also score points for your longest road and railroad, for building in the middle nine squares, and you lose points for any dead ends. If you're playing with an expansion, you can gain more points depending on the scenario it puts you in. Winner is the player with the most points after 7 rounds (6 with expansions).