Siege Weaponry of 40K

Quad Gun: this heavy device can be wheeled about, but still weighs 300 pounds. It is fired as a quadruple Mortar, firing all at once, however then requires a Full Round action to be manually reloaded (Rapid Reload reduces this to a Standard action). All caught in the area are subject to a [Fear] effect, needing to make a DC 20 Will save (+1 to the DC for every explosion covering their space after the first) or be Frightened for 4 rounds. If all four cover the occupied space and they fail the save, the target instead Panics for 4 rounds.

Siege Mortar: this heavy device can be wheeled about, but still weighs 300 pounds. This is fired as an "Empowered" Mortar, and takes a Full Round action to manually reload (Rapid Reload reduces this to a Standard action). It comes with one type of special ammunition in addition to regular shells:
• Breacher: damage is doubled against Immobile Structures, and ignores their Hardness.
• Inferno: deals Fire damage, all targets who fail the Reflex save catch fire, burning for 2d6 Fire damage per round.
• Flare: deals 4d6 Fire damage to the square it lands in, but otherwise creates a Light effect for 4 rounds.