Equipment Locker: The Swordstaff

An entirely fictitious weapon, the swordstaff (plural swordstaves) is exactly what it sounds like – a sword stuck on the end of half of a quarterstaff, favoured by technical fighters, melee-capable mages and show-offs alike.
Though somewhat similar in appearance to the glaive or duelling glaive, the swordstaff differs in a few ways. Firstly, the blade is attached to the haft via a tang, rather than a socket, making the blade seated much more firmly within the haft than a typical polearm, which may jostle when striking. Secondly, the centre of mass of a polearm is typically towards the head, whereas the swordstaff's is closer to the centre of the weapon, like a quarterstaff, making it better suited for personal combat and allowing powerful close-range swings and faster grip switching to accomplish both near and far strikes.

The combination of the blade and haft is long, about two yards, allowing a large working length for parrying and making the weapon a favourite of technical fighters. In addition, the ability to use the haft as a bludgeon is advantageous when you can't predict whether you need to kill or disable an opponent*. The biggest disadvantages are size and the impracticality of scabbards. Use Shortsword or Staff to wield it (at a -2 familiarity penalty if you've never trained with one before, which is likely). 

Some examples mount butt spikes, end caps or even spearheads on the base of the haft (see Customising Weapons, pp. 13-15, GURPS Low-Tech Companion 2: Weapons and Warriors). Some add a hilt (+1 Parry, +$100, +0.25lbs) or even a basket hilt to the haft, though basket hilts only protect one hand in certain grips. 

Swordstaves are popular with more martially-inclined mages, as they can be enchanted to become magical staffs. This is of less utility than one might think, since the blade is metallic and doesn't allow touch-range spells to be cast through it, but fitting a powerstone to the butt end allows a mage to draw upon it even while gripping their weapon, while the single yard of wooden haft can still shave a little off range penalties. Plus, it looks damn cool. Some crafty mages use a 'core' of organic material such as wood, horn, ivory or bone within the blade to get around this limitation, allowing spells to be cast through the entire length of the weapon. Swordstaves with organic cores are +0.5 CF, though the blade is at +1 to break.

TL	Weapon	Damage	Reach	Parry	Cost	Weight	ST	Notes
3	Swordstaff or or or	sw+1 cut thr+1 imp sw+1 cr thr+1 cr	1, 2 1, 2 1, 2 1, 2	+1 +1 +1 +1	$300 – – –	4.75 – – –	8† 8† 8† 8†

* – While all forms of damage are lethal in GURPS, crushing damage deals less injury than cutting or impaling and won't cause bleeding, so is a safer bet if you want to disable rather than kill. 

Under the Hood
The swordstaff was made by removing the hilt from a shortsword then adding "half" of the statistics from a quarterstaff with no end caps. The parry bonus was kept (with -1 from the sword lacking a hilt), the added weight and cost of the quarterstaff was halved and the ST requirement recalculated from the new weight. The weapon was inspired* by the Staff of Parthalan, the signature weapon of the protagonist from the Dragon Age 2 trailers, pictured above. 

* – I.e. stolen from.