Easter Egg: Prince of Persia
On the train level search the second car. Knock out the guard and go behind the fenced door. Look down to find a magazine featuring Prince of Persia.

Easter Egg: Annoy Lambert
When you begin the first level (Dili, Timor) you will start off in the water. Now just sit there, or run around in the water, but don’t progress through the level. After 15 seconds after Lambert stops briefing you, he will ask you what you are doing. 15 more seconds after you reply, he makes another comment. And another 15 seconds left, he tells you to get moving because lives are at stake. Now you are free to continue your game.