Of the various LSAT administrations offered each year, the most mysterious and often confounding for attendees has traditionally been February. The reason for this is that the February exam is nondisclosed: LSAC only releases your final score and its percentile, so you won't receive a copy of the test itself, the scoring scale, or your answer sheet to see how many you missed and where those misses occurred.
Not only does that lead to some understandable uncertainty when it comes to reviewing your performance, but it also raises the fairly obvious question of, "Why?" Why does LSAC choose to keep one test a year* a complete secret when the others are all provided for free to those who took it and ultimately available for purchase by anyone? The answer: reuse. Nondisclosed exams allow LSAC to readminister them in their entirety as needed, typically for later International, Sabbath Observer, and Make Up test dates. (And in all likelihood the upcoming July 2018 exam**)
Fortunately, while these tests aren't out "in the wild," a fair amount of information about them is still publicly-available online...information that I've taken the time to compile into a single, handy post below. So here's everything we can share*** about the February LSATs from 2016 all the way back to 2008: