First step: Get the unofficial restoration patch.
Second step: Have brain destroyed by amazing story. Stay on this step for a very long time (60+ hours).
Third step: Regret that there is no more story to discover. Hunt for next VN.
I've put well over 3k hours into this game over the years. With some decent human opponents, this game allows for some insane strategy and tactics. Highly recommended.
Wonderful sense of humor. Great gameplay. Sadly, I can't speak about the multiplayer experience yet, but the singleplayer game was one of the best campaigns I've ever played.