Rangers of Shadow Deep is a single player tabletop RPG, that also offers co-op up to 4 players.
Create your ranger, pick their Heroic Abilities, Skills, Spells and equip them for their adventure, and finally recruit as many companions as you can afford (the more skills and abilities your Ranger has, the fewer follows you'll be able to bring along).
The rulebook includes an introductory quest to play through, made up of several scenarios, where you will search for clues and likely find yourself fighting off some AI baddies. Then once you've mastered the basics and levelled up your Ranger, you can move on to the full quest included at the end of the rulebook.
The game itself offers great narritive, more like tabletop rollplaying than a straight up wargame, and plays really well. I found it very easy to pick up (though it is a similar mechanic to Frostgrave, which I've played before, as both games are by the same author), where the turn is broken down into activation phases, and lots of the rolls are your stat vs the opponent, e.g. your Fight stat+roll vs the opponents Fight stat+roll. I also wasn't sure how I'd enjoy the enemy activations, but the "AI" makes a lot of sense, and after a while I found i didn't need to keep referring to the flow chart to see how the baddies would act.
Rangers of Shadow Deep is a D20 playing system, so you'll need at least a couple of twenty-sides dice to play, as well as a deck of playing cards which are used to determine random events. As well as this you'll need a handful of miniatures to use as your Ranger and their companions, as well as some more miniatures to represent the evil denizens of the Shadow Deep, something to represent terrain (such as trees, ruins and rocks), and a playing surface 2.5'x2.5'.
Overall, I've had a great time trying out this game, and I can't wait to build a dedicated Ranger and head back into the Shadow Deep to thwart some evil!