This achievement requires you to collect the ten guns available in the base game. You start the game with five and can collect two during the tutorial leaving three to be unlocked in latter missions. This achievement does not require you to collect the three weapons that were originally part of the Tri-Weapon Pack DLC.
Weapons can be collected either from fallen troops or collected from the green weapon caches throughout the game. The content of the causes is random but you should find all three of the required weapons with the first Act.
You start the game with the following weapons:
- Assault Rifle
- Heavy Machine Gun
- Shotgun
- EMP Emitter
- Hand Grenade
You can collect the following weapons during the tutorial:
- Rocket Launcher
- Disk Launcher
You need to collect the following weapons:
- LFE Gun
- Lock-On Laser
- Sniper Rifle
You DO NOT need to collect the following weapons:
- Boost Machine Gun
- Laser Cannon
- Anti-Armor Pistol