Very pleasantly surprised with this game. As a team of rangers you have to accomplish missions which essentially means finding your most efficient path to a target location. You can only have two active missions at a time, complete those then you can collect more at the ranger stations, and how you distribute those missions can be critical. At the same time you need to "record" the different species, and all of them by game end. For this purpose you have multi-use cards which you draw then "reverse-draft" by giving them to your neighbors, with no communication allowed. The co-op nature is obvious as in reality you are carefully analyzing their routes and missions to give them the best chance to get where they need to go. The game introduces slightly more complex rules depending on what level you want to play at (from level 1 to level 5), but there is not a ton of overhead. Player powers, variable weather, special missions - it won't take you long before you will introduce all of these features. It is challenging and a great deal of fun! The solo mode is well designed and excellent too!