I played the beta through. It's basically Far Cry 3/4 with pimped equipment and optional Co-Op. The mechanics are really, really similar. I played solo and with my nephews. Personally I like solo better. People complain about the AI of your squad members, but you have to understand the their limitations and manage them properly to make it work. Once you get the hang of it, it's fun. It's great that you can switch seamlessly between Solo and Co-Op meaning people can join or leave during missions. Handling of certain vehicles could be better as was the case with Far Cry. Enemy AI could be better, it's about Far Cry level in normal difficulty. The scope of the game seems to be huge. The beta had 2 provinces, the final game will have 21. From that I'd estimate that the game will be at least 3 or 4 times as big as Far Cry 4.