Collected the clear crystals in Chapter 4-2 without being detected by the security robots

Reach Level 10

Complete "Diplomatic Immunity"

Complete "The Way of the Voice"

Select a Standing Stone blessing

Complete "Bleak Falls Barrow"

Complete Friends in High Places

Perform a melee kill on 10 enemies anywhere in the campaign

The player has completed the game without harvesting any Little Sisters

Purchased every slot in all four Plasmid and Tonic tracks

The player has become a Big Daddy

The player has broken Fontaine's mind control

The player has successfully invented all possible ammo types