Kill a high dragon in single-player mode.

Killed 500 darkspawn

Purchase or secure five different mounts of any kind.

Close the Breach.

Collect 150 Items

Befriend five wolves.

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Breed two cows with wheat.

Attack and destroy a monster.

Cook and eat a pork chop.

Play a music disc in a Jukebox.

Craft and place a sign.