Battlefield 4 is packed with hidden easter eggs, from subtle references to elaborate puzzles. Keep an eye out for the infamous 'Dinosaur' easter egg on certain maps, or the 'Phantom Program' challenges that unlock unique weapons and cosmetics. Exploring off the beaten path can often lead to surprising discoveries and fun moments.

Notable Easter Eggs:
- Dinosaur Roars: On maps like Paracel Storm, listen closely for distant dinosaur roars.
- Phantom Program: A series of elaborate challenges requiring specific dog tags and assignments to unlock the Phantom Bow and other items. This involves finding hidden elevators and inputting codes.
- Locker Shark: On the map 'Locker', there's a hidden shark that can be triggered.
- Giant Megalodon: On the 'Nansha Strike' map (Naval Strike DLC), a massive Megalodon shark can be summoned by a specific sequence of actions.
- Levolution Secrets: Some Levolution events have hidden triggers or additional effects.