Never underestimate the power of HTH combat even in Rifts. Character I once played was not only a good shot with a gun, but was an absolute terror in HTH (Very high HTH bonuses due to High PP, RCC and OCC combo. It wasnt actually intentional)
As a result I actually more often than ont wound up putting away the guns and pulling out a pair of swords. Which at first drew incredulous stares untill the enemy was quickly cut to pieces.
Disarming worked quite well too. The character in question was actually on a Rifts MUSH so there were a few cases of character fighting character. There were a efw who were better with a gun than I was. But that didnt really matter if I disarmed them.
This sort of mentality would likely work quite well with juicers and other high PP characters etc. Also things like knockdown, knockout, pin attacks etc.
Sure.. they dont do damage. But.. what if say.. one NPC pins a character while another pulls out a handgun to shoot him? You could quite easily wind up wtih a PC being taken hostage.
And.. well to my line of thinking. If the PCs say attempt to shoot their way out of it. The NPCs in question, will not hesitate to kill the hostage even if it's a PC. But then I tend to play alot of Shadowrun and its just one of those sorta games where you face off against that kinda stuff quite often. And PC death is really to be expected (what with all the billions of doublecrosses, screwjobs, jobs gone bad etc)
I still resolve it via established combat rules of course. But I try to make my PCs think abit more beyond 'oh lets just shoot them'.
Also maybe pit them against NPCs they MUST subdue rather than kill. With an obviously very unwilling to co-operate NPC.
Not sure on the kinda game your running but one example I've used (Though again from SR, which alas is all I've had a chance to play last two years) is this..
You'll have an NPC say.. put a bounty on another NPC. Or maybe the NPC in question has vital information that only they know. So obviously you need this person alive.
But their more than willing to do what it takes to -kill you-. Maybe they'll even try to suicide once in captivity if your extra evil.
So how do you subdue him? Well.. generally HTH is the only real option unless you've got a taser or something. ANd given its the Rifts setting just give him MDC EBA. Most 'taser' type weapons that work through EBA in Rifts will have a very high chance of killing some one if used on the kinda power level required to stun someone through MDC bodyarmor.
Most wont even be able to do that.
EIther way try to present them with a few scenarios where disarming/subduing is the optimal course of action, or even the only one that will save a hostage or some such.
Like Little Mary Hopkins has been taken hostage! Her hostage takers are juicers in EBA with laser weapons and when the PCs are there one of the hostage takers has a gun to her head. Eevn if they get a shot off they likely wont kill the guy in a single hit without risking misting the hostage, and if the hostage taker survives the hit he WILL kill the hostage.
ANd if that happens have them chased out of town by an angry pitchfork and las rifle wielding mob or something.
And then have NPCs come after them out of revenge, maybe even cause other trouble for them.
Be EVIL