The first is full dublication:

1. when u choose a server u have the wait for host and the test 123, when theres ready u quickly exit that server and rejoin it. When u rejoin it there will be 2 of you. You can move freely while the other one will either stand still or go prone. Then you will just kill him and u can take all his (your) loot.

The second is palyer used items:
This i discovered yesterday, when u apply etc morphine u have to stay still. WHen u use it on another player if that player moves away it will cancle the action and u will get a second morphine. I dont know if this can be used with blood bags and saline bags tho

Not many people know of this i think but its pretty known in my group. I have used it when i have died and it is a good way to get stuff back. This is not a critical thing at the moment as there are more bugs and glitches and error, esp with the new battle eye implement wich is causing mayor lag. I hope that there wont be mayor consecuenses on me because of this. Good game tho and pretty solid for a pre-alpha!