Plasma Incinerator
* Primary Weapon
* Tactical Class Exclusive
* Rapid-fire, mid-range plasma weapons. Can be charged.
* A good weapon for all kinds of combat scenarios with its charged shots and area-of-effect damage, this firearm also spreads out its stats in a balanced fashion, and has a 130 round magazine.
Melta Rifle
* Primary Weapon
* Tactical and Vanguard Classes
* Close-range thermal weapon.
* Shotgun style firearm for room clearing and crowd control. Relatively small magazine, and only three full reloads in reserve. Best for PVP over PVE.
Heavy Bolt Pistol
* Secondary Weapon
* Assault Class Exclusive
* High-powered, semi-automatic, mid-range pistol.
* The better of the two sidearms, with a smaller magazine and reserves, but better stats overall.
Thunder Hammer
* Melee Weapon
* Assault Class Exclusive
* Slow Melee Weapon that deals powerful area-of-effect Damage.
* An Assault Class exclusive for a reason, this should be your go-to for melee combat. Makes up for the slow attack speed with sheer brute force power.
Occulus Bolt Carbine
* Primary Weapon
* Vanguard Class Exclusive
* Rapid-fire, mid-range carbine with extended magazine.
* Large magazine, and seven full reloads in reserve for fast kills at close range.
Plasma Pistol
* Secondary Weapon
* Bulwark and Heavy Class
* Rapid-fire, mid-range plasma pistol. Can be charged.
* A mini version of the Plasma Incinerator with the same charge attack, and area-of-effect damage potential.
Power Sword
* Melee Weapon
* Bulwark Class Exclusive
* Versatile Melee Weapon.
* A shield-bearer requires a sword, and the class-exclusive Power Sword is the best there is, with balanced Defence, Strength, and Speed stats.
Las Fusil
* Primary Weapon
* Sniper Class Exclusive
* Scoped, single-fire energy rifle.
* Large magazine capacity and massive damage potential make this the go-to long-distance firearm for snipers.
Multi-Melta
* Primary Weapon
* Heavy Class Exclusive
* Close-range, high-powered thermal weapon.
* Effectively a double-barreled shotgun, the 20-round magazine makes it a more effective tool for crowd control than the standard Melta Rifle in PVE.
Those are the best weapons to upgrade first in Warhammer 40,000: Space Marine 2.
http://dlvr.it/TD2w70