Invisible Characters? - stealth suits & cloaking devices

[atomicfloozy]

Suppose I'm playing a game where my band encounters Predator Aliens. How do you represent the Predator's technology to make itself seem invisible on the table top?

Looking for ideas, thanks.

[TheConvenientSkill]

I'd be tempted to give it all of the advantages on the Action table. That should almost always give it advantage, and you stay 'within the rules'.

[squidlord]

Alternately, don't represent it on the table at the beginning as a figure – make it a PEF. In fact, multiple PEFs. Once for which long-range line of sight does not suffice to resolve it.

Instead, being within 10 inches and having line of sight is guaranteed to resolve the PEF as the Predator or not. Alternately, units may blind fire into a PEF against REP 4 at REP -2 to their own fire. A hit will immediately resolve the PEF as the Predator or not. If it is the Predator, resolve damage as if the alien is in cover. Don't forget to make sure that auto fire weapons are not out of ammo when using them to detect Predators this way.

Predators will always attempt to re-cloak on their next turn as one action. A simple REP check will do it, at which point place 1d3 PEFs at that location and move them in any direction except toward the fire that revealed them 2d6 inches.

The Predator may ambush units if one of its PEFs has line of sight to them and is in concealing terrain, roll 5+ and if successful resolve chosen weapons as appropriate. This includes triggering an In Sight roll if attacking within the front half of a figure within line of sight.

You'll probably want a simple movement table for the Predator PEFs which I am too lazy to put together right now, but it should both push the Predator PEFs further apart and tend to make them move around to the backside of any attacking force.

There you go. That should cover most of the behaviors of an invisible Predator and allow it to be played against run by the game.

[stryderg]

Another idea:
Resolve a PEF as a predator
Players take a challenge test. If they pass, they can fire; if not, then the know something is in that area but can't fire.
Next activation, if the predator is still in view, they take the challenge at +1 rep.

But squidlord's ideas seem much more thought out.