Re: [Psi-Tech] Strategic Psychotronic Devices
 

I agree. Astral Projection, ESP, and Telepathy are quite useful. Astral Projection allows for direct spying without any detection, ESP allows for improved planning (it is less useful for direct spying than Astral Projection because of the limited range), and Telepathy allows for subversion. Possession with Full Memory Access (+10%) and Telecontrol 2 (+100%) allows for the ultimate double agent, though Mind Control is probably sufficient for most purposes.

Re: [Psi-Tech] Strategic Psychotronic Devices
 

Other than by other astrally projecting counter-agents, of course. One could also develop appropriate psi-tech, like an "astral detector" or some kind of astral trap. The comic book The Invisibles had a military base partly protected by something that allowed them to grab "remote viewers" projecting in and feed them whatever crazy scenario they liked. Real-life alleged remote viewers like Lyn Buchanan talk about using "topologically interesting" objects in a sensitive area to distract remote viewers from whatever other object they are trying to view remotely.

Re: [Psi-Tech] Strategic Psychotronic Devices
 

Also, Anti-Psi and Meta-Psi abilities and equipment may exist in-setting, as well as beings who can't project themselves, but can use Astral Sight and Astral Sword (or other crossworld abilities) to detect and attack astral spies.

Re: [Psi-Tech] Strategic Psychotronic Devices
 

Of course, but we are then talking about the reason why Psionic gives -10%, it has countermeasures.

Re: [Psi-Tech] Strategic Psychotronic Devices
 

Which turns things into an arms race, which is good for gaming.

I don't know if espionage in general is a "Strategic Weapon", but it is essential to the foreign policy of people who have access o strategic weapons.

The nasty telepathic disabling weapon reminds me of Larry Niven's precursor species, who were wiped out by a galaxy spanning psi-bomb that commanded suicide.