Thanks to a video posted to the r/Helldivers Reddit by user Fozzye18, we can see a short 22-second video of a player controlling a mech and, near the end of the video, a small glimpse of how its weapons are in action.
They also explain that other players had access to new weapons, which include 'like an energy RPG coming, a meteorite that hits like the nuke, a group of helldivers you can call in to support you(npcs), and more.'
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