Here it goes:
-Armor let's you absorb more damage
-Stealth makes you harder to see
-Power jumps make you jump higher
-grabbing ledges is better than taking stairs
-be sure to have ammo or you can't shoot
-weapons are able to kill people
-some weapons are stronger than others
-aiming down sights improves your accuracy
-reloading on a regular basis is recommended
-grenades explode
-you can sprint forever
-killing enemies greatly helps your team
-aim for the head
-suit modules have 3 different levels
-use the SCAR
-when two players shoot at one another, one will eventually die
-sometimes both players die
-you can hijack the Pinger
-enemies are red
-use your radar and brain to determine where an enemy might be heading next
-your character can hold his breath longer than you in real life
That's all for know. Hope I could help some of you beginners. See you on the battlefield!