Can't say it's the best game ever, but it's quite good. Campaign is easy, on normal difficulty, but DLCs getting increasingly hard. Have not tried "helish" mode, last two campaigns on "normal" were challenging enough. Probably very fun co-op, have not tried it. Downfall is each mission can be hard early and mid game, and too easy when you got Titam units.That may feel repetative. Loved voice acting and self-awarnesss.
5 out of 6 missions have forced mechanics (limited turns) to rush the game instead of enjoying your gameplay. It does NOT make game harder or more challenging or smarter- it just forces you to constantly save and reload. Poor design, lazy approach. If you hated these "rush" missions in the first XCom- don't buy this game, you will be disappointed. I know I am.