Use a Metro Station to Fast Travel.

Kill 50 enemies with a Spear.

Activate your first Metro Station.

Activate your first Electrical Substation.

Kill a Spitter using a ranged weapon.

Lose the maximum level of Chase.

Modify your weapon for the first time.

Perform 50 takedowns.

Activate your first Windmill.

Use an Inhibitor for the first time.

Kill 20 enemies in a row with melee weapons without taking damage.

Find 100 hidden packages.

Use the M4 to take out Diaz during the mission "Rub Out".