Tips and Tricks

Movement
While they may go fast, bullets don't teleport. Use this to your advantage to dodge death. Being a sitting duck will literally and figuratively get you nowhere, so get moving and get some kills.

Instakill Combos
Double-shooting can be done with many weapons. Some combinations that are worth trying are:
 * Barrett and RPG
 * Two Barretts
 * M79 and RPG
 * Two RPGs

To get a pair of weapons like double Barrett or M79 you will need to either suicide and pick up your old weapon or find the necessary weapon somewhere on the map (i.e. the weapon pile below Arctic Dusk)

Barrett and RPG
It does not matter which order you shoot the weapons in but to shoot the RPG you need to prone or crouch (X and S respectively). You will also need to press Q to switch weapons. It is not necessary to stop proning or crouching when you shoot the Barrett. Optimise your actions. The same applies for M79 and RPG.

Two Barretts
You do not need to prone or crouch for this, but you need to click and press Q quite fast.

Two RPGs
For this it is necessary to keep proning or crouching when shooting both. You only need to press X once, but you will need to hold S.

Keep in mind only the M79 has a fast enough reload to keep your shots always ready to use. Barretts and RPGs have very slow reloads, perhaps the slowest, making them a risky weapon to hold, but does not alter their effectiveness.

M79 Launch
The M79 launch is a great advantage in speed, but a disadvantage in health. Losing health depends on where you shoot. An ideal strategy is to jump with W and immediately shoot in the opposite direction of desired travel and your loss of health will be minimised.