If you're interested in the animated version of Clannad, I suggest you watch the animated version first. The animated version was even more outstanding in terms of storyline and character creation, especially in terms of depicting the emotions of the characters such as Nagisa and Sae. The game version focused more on the adventure and combat system of the game, as well as the bond and emotional communication between the characters. Therefore, if you prefer the style and presentation of the animation, you can watch the animated version first. If you are interested in the game version, you can play the game first before watching the animated version. The game version provided a more in-depth storyline, character setting, and a more complete adventure experience. Through playing the game, you can better understand the background and story of Clannad and better understand and appreciate the animated version.