Terraria remains an absolute masterpiece in my eyes. It has gorgeous pixel art with tons load of content, (almost 600 weapons, 33 bosses, and 5400 items!). The game is way too addictive and devs keep adding new content every "final" update. I have never seen a company so passionate about their game. And the modding scene is equally incredible, with massive expansions like Calamity, Thorium, and Fargo's keeping the experience fresh every single time I jump back in.
I have played the game for about 2500+ hours (not including mods), and I will keep playing it.
Thanks, Re-Logic