Complete "Diplomatic Immunity"
Jump 1,000 times
Roast your mallows over a campfire
Kill the kicked enemy while it is still in the air.
Rip 10 Juvenile spiders apart.
Squash 10 Hatchling spiders.
Kill an enemy with a gib torn from another enemy.
Kill at least 5 headless kamikazes in one explosion.
Remove 10 Gnaar eyes.
Have 100,000 gold
Find Sam's classic outfit
Bonk after missing a Gold Bar to rewind time and try again
Complete a bonus challenge
Register a high score on the leaderboards
Get CommanderVideo's cape
For the rest of us!
Rescue professor Stein. So to say.
Complete any level in single player.
Decipher an Egyptian text.
Complete "Hail Sithis!"
Find 13 Standing Stones
Read 50 Skill Books
Complete "Bound Until Death"
Obtained the Polar Star!
Get married
Join the Dark Brotherhood
Join the Thieves Guild
Clear 50 dungeons
Absorb 20 dragon souls
Discover 100 Locations
Complete 50 Misc Objectives
Join the College of Winterhold
Successfully persuade, bribe, and intimidate
Get a skill to 100
Learn all three words of a shout
Reach Level 25
Acquire a Daedric Artifact
Complete "The Way of the Voice"
Chop wood, mine ore, and cook food
Join the Companions
Buy a house
Make a smithed item, an enchanted item, and a potion
Reach Level 10
Absorb a dragon soul
Complete "Bleak Falls Barrow"
Reach Level 5
Select a Standing Stone blessing
Complete "Unbound"
Experience all the different endings that Deus Ex: Human Revolution has to offer.
You watched the entire credit list and saw the surprise at the end.