Re: Sci-Fi Melee Weapons: Bat'leth, Lirpas, Lightsabres, Rykk Blades, Koltari, Denn'B
Leaving aside the Hero stats for a moment--
The Lirpa is interesting because the center of mass would be very far toward the club end. This would lend it toward being wielded with the hands closer to the club end, as a sort of very long axe, with the tactical bonus that you could catch your swinging Lirpa toward the blade end and quickly transfer the momentum to the club end without having to muscle it into motion so much. I'd expect a martial art built around the Lirpa to involve a lot of circular slashing/smashing strikes with an emphasis on keeping the thing swinging. Of course it ought to have a high STR min as befits the cheesy Vulcan race, as well as a reach advantage and an OCV penalty.
The Ryyk blades would also have a high STR min but the layouts vary so much. Some might be statted out as a plain 2H sword, but the tonfalike ones might have an OCV penalty and a bonus to block.
Bat'leths are probably the most versatile weapon in the list--one or two hand operation, lends itself to blocking, and has flanges that could make it good for disarming. Definitely an OCV penalty though, if not an outright requirement that you learn the martial art to use it.
Of course, alien races don't have a monopoly on suicidally weird melee weapons.