
A more expansive list of Codex will appear at the end of this page. Pausing a campaign mission displays the unlockable Field Manuals and Codex Entries for that mission (see image above). For example, during the early missions there is a Codex called "Guiding Bess" which challenges you to get through the forest without being detected by the enemy. Campaign missions have their own set of unique Codex which are typically harder to achieve and also contextual to that map and environment. Other good examples are "Storm of Steel" unlocked by killing 10 enemies with a stationary weapon, "Villers-Bretonneux" unlocked by winning a single game on Amiens and "Breakthrough at Last" unlocked by winning a single game of Operations. As you can see this is a very simple Codex which doesn't take very long to complete. A good example of a Codex is "Colonial-Troops" which players can unlock by performing 3 kill assists. Codex are like mini-challenges, some simple, others more complex. Players can unlock many different Codex, each one counting towards greater unlocks and achievements.

These mini-achievements are unlocked in-game and appear directly as their own notification on the left side of the screen.

Battlefield 1 contains a new series of unlockables called Codex Entries.
