In respect to this, can you keep playing after you beat ghost of Tsushima?
Unlockables and What to do After Beating the Game
You can continue exploring the island of Tsushima, finding new locations, and collectibles to 100% the game.
Likewise, can you kill all Mongols in Ghost of Tsushima? Killing the Khan doesn't end the invasion — there are still Mongol encampments strewn all over Tsushima. All of Jin's sacrifices to save Tsushima will not be attributed to him or clan Sakai, but to the Ghost.
Then, is Ghost of Tsushima worth buying?
Ghost of Tsushima is something that'll go down in history for having everything perfected. A true tribute to the end of PS4 era. The music, the story, the gameplay, everything is unparalleled. Just go for it, you won't be disappointed, definitely worth it.
Did you kill or spare Lord Shimura?
If you killed Shimura, you'll get the "Righteous Punishment" white coloration for your armor, as well as the Ghost mask and headband. If you spared him, you get the "Vow of Vengeance," a crimson red dye that we feel is the superior of the two.