The use of Tier one. When there is 1 or 2 enemies active it, this will earn you about 100% more points after each round so you can get more to pay for guns. Then after when the round starts you deactivate it to not die instantly. Also if you want a point bonus when starting from round 1, go into campaign and make sure you got tier one activated, this will give you enough points from start to buy a decent weapon that you will be using throughout the whole guerrilla game.

The use of drone to scout, scouting does give points so finding enemies before they get permanently visible automatically, you can get about 300+ points depending on difficulty each round. It is also extremely useful to take down helicopters since you can literally fly straight into a helicopter and the helicopter rotors break, I have tried on the attack chopper as well but it doesn't seem to work as easily so you kinda have to be really close to where the rotors start or you should probably stick to using EMP to take it down.

Knowing the map, try to learn it quickly and know where all the good spots are, this changes from player to player because everyone plays differently but one of the best spots I found is the big green house across the road from the annoying woman always talking. You can get to the roof by shooting a window and you can then camp the easily to defend 3 of the packages.

This is the green house. -----------------------------------------------------------V here lol

Full protection over what I call Alpha (1st crate).

Full protection over what I call Bravo (2nd crate). You can shoot right through the tents.

Full protection over what I call Charlie (3rd crate).

Best places I found for the two last crates. Between the container at Delta (4th crate).

And Echo (5th crate) I managed to easily defend here.

At round 6 when you unlock EMP drone you can actually EMP the generator to make the map dark, which makes it slightly harder for the enemies to detect you when you hide. I tested this about three times and I confirmed that it makes it harder to be seen but also slightly harder for you to see your enemies if you don't scout or use night vision googles.

This is just a short guide so far on tips and tricks I found during my games and I will most likely keep adding or changing this guide as I play and find new ideas. It is much easier to play with a friend or friends as well since the AI bots are pretty garbage. I do realize the use of activating and deactivating tier one mode is a bs strategy but it works so that's why I use it. You will unlock survivor pants and the survivor t-shirt when finishing round 25.

Personally I've gone much further into the game by using a assault rifle or a smg, the snipers are not a good choice because the enemies will push you and then you are easily out numbered even with the crap AI bots protecting you. With a friends you might have better luck using sniper since it would give good backup throughout the game.