Nidhogg achievements

Dominate every level in one singleplayer game

Win 100 games through matchmaking

Intelligence gathered

Let the timer run out in your opponent's last screen and win in sudden death

Play a match lasting longer than 20 minutes

Finish an 8 player tournament

Run across your final screen in the castle with your sword cocked the whole time

100 total kills in one match

Win the faceoff and never lose the arrow in a singleplayer match

Beat the singleplayer game

Trap your opponent on your sword for a long time

Get eaten by the nidhogg after nearly allowing your opponent to do the same