26. Defeated Adephagos (200 points): Get this for completing Part 3 and the entire game.
27. Secret Mission 1 (5 points): Don't let Zagi seriously injure Estelle in this fight.
28. Secret Mission 2 (5 points): Attack Goliath from behind as he charges his attack, then knock him to the ground.
29. Secret Mission 3 (5 points): Use the plants around the battle field to stun Gattuso.
30. Secret Mission 4 (5 points): Attack Zagi near the side of the boat in order to knock him over and into the water.
31. Secret Mission 5 (5 points): When the Dread Giant rears on its hind legs, attack it from behind to knock it over.
32. Secret Mission 6 (5 points): Keep the Gigalarva from healing itself by using Raven's arte, 'Serpent'.
33. Secret Mission 7 (5 points): Destroy the bridge supports that surround the battle area when fighting Barbos.
34. Secret Mission 8 (5 points): If you wait long enough, Zagi's charged blastia will explode.
35. Secret Mission 9 (5 points): Once Pteropus breaks up into many different bats, attack the leader to end the battle early.
36. Secret Mission 10 (5 points): When Outbreaker spits out its core, break it.
37. Secret Mission 11 (5 points): Use fire magic skills to light the candles surrounding the battle arena.
38. Secret Mission 12 (5 points): When Tison and Nan get stuck to the ground, knock them over.
39. Secret Mission 13 (5 points): When Schwann clutches his chest, attack him.
40. Secret Mission 14 (5 points): Cure Zagi's poison with Karol's arte skill 'Nice Recovery Smash'.
41. Secret Mission 15 (5 points): Attack Baitojoh's fin when he's in the water. Do this three times.
42. Secret Mission 16 (5 points): Use Mother's Momento when you're fighting Estelle alone.
43. Secret Mission 17 (5 points): Use Raven's arte skill 'Rain' on Yaeger's chest.
44. Secret Mission 18 (5 points): Hit Alexei right after he uses his mystic arte.
45. Secret Mission 19 (5 points): When Gusios rears onto his hind legs, attack from behind and knock him over.
46. Secret Mission 20 (5 points): When Khroma uses her 'Earthquake' attack skill, keep hitting her during the middle of it.
47. Secret Mission 21 (5 points): Wait it out until Flynn uses all of his arte skills.
48. Secret Mission 22 (5 points): Once Zagi uses his special arte skill, 'Blastia Bane' start hitting him right away.
49. Secret Mission 23 (5 points): Use a mystic arte to defeat Duke.
50. Vesperia Master (0 points): Get all other achievements for Tales of Vesperia.