Here is the full list of all 30 Samurai Shodown NeoGeo Collection trophies - there are 10 bronze, 14 silver, 5 gold and 1 platinum.
Obtain all other trophies
Clear any game at its highest difficulty setting
Defeat the optional boss Mizuki in Samurai Shodown V Special or Perfect as Amakusa, Zankuro, Gaoh, or Mizuki.
Defeat the last boss Gaoh in Samurai Shodown V as Rera, Enja, Suija, or Rasetsumaru
Defeat the last boss Gaoh in Samurai Shodown V as Yoshitora, Yunfei, Mina, or Kusaregedo
Defeat the last boss Gaoh in Samurai Shodown V as Poppy
Defeat the last boss Gaoh in Samurai Shodown V
Get a Character Specific Ending in Samurai Shodown IV
Get a Character Specific Ending in Samurai Shodown IV as Kazuki or Sogetsu
Perform a ‘No Contest’ move in Samurai Shodown IV
Perform a 'Link Slash' move in Samurai Shodown IV
Perform a ‘Honorable Death’ move in Samurai Shodown IV, Samurai Shodown V, or Samurai Shodown V Special
Defeat the last boss Zankuro in Samurai Shodown III
Defeat the last boss Zankuro in Samurai Shodown III as Shizumaru
Clear Samurai Shodown III as Rimururu, Shizumaru, Gaira, or Basara
Perform a ‘Barehanded Sword Grab’ in any game
Defeat the last boss Mizuki in Samurai Shodown II as Genjuro, Cham Cham, Neinhalt, or Nicotine
Defeat the last boss Mizuki in Samurai Shodown II
Defeat the last boss Mizuki in Samurai Shodown II as Nakoruru
Defeat Kuroko in Samurai Shodown II
Perform a ‘Toy Transformation’ move in Samurai Shodown II
Defeat the last boss Amakusa in Samurai Shodown as Haohmaru
Defeat the last boss Amakusa in Samurai Shodown
Perform a ‘Fatal Flash’ move in Samurai Shodown IV, Samurai Shodown V, or Samurai Shodown V Special
Eviscerate your opponent at the end of a match in Samurai Shodown, Samurai Shodown II, or Samurai Shodown III
Perform a Weapon Breaker or POW Special in Samurai Shodown II, Samurai Shodown III, Samurai Shodown IV, Samurai Shodown V, or Samurai Shodown V Special
Pick up an Item delivered by the Edo Express Delivery Man in Samurai Shodown or Samurai Shodown II
Win a ‘Sword Clash’ in any game
Defeat the optional boss Mizuki in Samurai Shodown V Special or Perfect
Perform an 'Overkill' move in Samurai Shodown V Special or Perfect