Castlevania: Lords of Shadow

Enchanted Forest

30 Goblins with their own grenades: There will be a part where you have to throw the goblin grenades at a big wooden door to break it. Just press to throw your whip at a goblin, you will grab them, point the analog stick in any direction and complete the QTE. Gabriel will throw them and they'll run around as time bombs.

Underground Caves

Spider Venom: To get yourself poisoned, attack the spider while it's blocking, it will preform an unblockable attack on you and poison you. While poisoned, attack the spider and kill it to get your 1st kill. There is no set way to MAKE them block, you just have to hope, restart your checkpoint if you mess up. Another way of getting poisoned is standing in front of it while blocking, it'll jump away sometimes, just dodge roll to it and should jump on you, purposely fail the button mashing sequence and you should be poisoned. At the 2nd encounter, there will be lycans running around. Get poisoned and kill the lycans, then the spider. Moving on you will find a group of goblins and you will use their grenades to blow up a door, do not kill these goblins. Blow up the door and the get the key, when you come back you'll find a spider waiting for you, get poisoned and kill everyone. If you still don't have it, there is another spider you can kill.

Strategy 2: When you meet the 2nd group of enemies (the lycans and the spider), kill the lycans but leave the spider alive. Move on through the stage till you hit a checkpoint - restart your checkpoint and go back. The group of enemies will be back and you'll have kept your progress with the trial. Rinse and repeat until you get it.

Labyrinth Entrance

5 Warthogs: When the pigs get stunned and you have to mount them, don't. Just keep attacking and they'll die, another pig will then come out. Rinse and repeat this for 5 dead warthogs.

Waterfalls of Agharta

20 Trolls: You will fight a Big Troll and be forced to mount him. Try and ignore the little tiny trolls and focus on the big guy, once you stun him, mount him, and go trolling.

Agharta

No shadow magic: Don't use any, simple.

Dark Dungeon

No gripping the gremlins: Gremlins are the annoying flying red guys that spit fire at you, you have to get through the level without grabbing any of them with the button.

Sanctuary Entrance

20 Neutral Orbs: There will be two parts where you fight 3 large lycans - that's two chances to get this. Focus block every attack and keep your focus meter full, when you feel there are enough orbs in the air, absorb them and be rewarded with a finished trial. You will also fight a big troll that you will need to mount, it's pretty big and slow, focus counter against him to get the orbs if the 3 lycans are too much for you.

Sanctuary of Titans

Titan in 2:00: You will need a Dark Crystal for this one. Run straight up to the titan and use the crystal, then run away. Her health will plummet, now every rune on her will break in one hit. Climb as fast as you can, make no mistakes and the Trial is yours. Never stop moving.

The Black Knight

No light magic: Counter frequently and use your shadow magic.