Nidhogg

Start an offline versus game, for example "Mines". Remain idle for about 70 minutes. Take control of the orange player and win the match.

You only have to play 100 games, and it does not need to be through matchmaking. You must play 100 rounds online with a partner. This cannot be done with bots.
avr,

Complete the following tasks to unlock PlayStation trophy rewards.

COMEBACK KID (Bronze): Get eaten by the nidhogg after nearly allowing your opponent to do the same.

MEMORIES (Bronze): Trap your opponent on your sword for a long time.

FLESH AND BLOOD (Bronze): Beat the singleplayer game.

PERFECT STRIDE (Bronze): Win the faceoff and never lose the arrow in a singleplayer match.

BLOODLUST (Bronze): 100 total kills in one match.

PROMETHEUS (Bronze): Run across your final screen in the castle with your sword cocked the whole time.

GTD (Bronze): Finish an 8 player tournament.

SLOW PLAYED (Silver): Let the timer run out in your opponent's last screen and win in sudden death.

VALKYRIE (Silver): Win 100 games through matchmaking.

TRAPPED IN DONKEYSPACE (Silver): Play a match lasting longer than 20 minutes.

NSA (Silver): Intelligence gathered.

HOGGLIKE (Gold): Dominate every level in one singleplayer game.