Getting every objective done for both story and free mode in Dynasty Warriors 8 XL - this includes but is not limited to: Beating all stages in Ultimate, leveling up every character to 150, getting all the special weapons for each of them, unlocking all videos, completing all the optional objectives in free mode, getting all special animals, and getting four thousand kills in one single stage (doing a free mode run of the final stage of Wei's hypothetical story, with level 150 Lu Lingqi.)
After all that, I level-reset Xiao Qiao and played through all of the "Hu Lao Gate" stage in Ultimate, the only special thing I had were the 6-star fans. Since I was feeling suicidal, I also made Lu Bu rage by killing Diao Chan. Still, I did the smart thing and went after Dong Zhuo while Lu Bu chased after me - I was feeling suicidal, not stupid.
I've played that game too damn much, I think.