Rescue a Follower who's been captured.

The player has fully upgraded one weapon

The player has acquired at least one weapon upgrade

The player has successfully hacked a security camera

The player has taken at least one Research Photo of a Splicer

Resurrect a Follower Captain.

The player has purchased one slot in any Plasmid or Tonic track

The player has successfully hacked a safe

The player has performed at least one successful hack

The player has successfully completed the Welcome To Rapture Level

Complete all Shadow of the Past missions in one region.

Recruit an Orc after he's killed you three or more times.

Make a Captain kill his bloodbrother.