You died.
Defeated a Brute
Cleared Onslaught Mode on any scenario and difficulty.
Cleared a Campaign Scenario on Easy Difficulty or Higher.
Cleared a Campaign scenario on Normal Difficulty or Higher.
Cleared a Campaign scenario on Biohazard Difficulty or Higher.
Cleared a Campaign scenario on Nightmare Difficulty.
Defeated a Zombie.
Defeated a Reptile.
Defeated an Enforcer.
Fail to survive.
Complete Onslaught Mode on any difficulty.
Clear a Campaign Scenario on Easy Difficulty or higher.
Clear a Campaign Scenario on Normal Difficulty or higher.
Clear a Campaign Scenario on Biohazard Difficulty or higher.
Clear a Campaign Scenario on Nightmare Difficulty or higher.
Defeat a Zombie.
Defeat a Reptile.