[Suicide Junkie]

The point here was not to nessesarily make the techs harder to reach, but to create a one-upmanship cycle.

Ha! Cloaked ships
HA Ha! tachyon sensors!
oh, yeah, i got level 4 now!
no prob, i'll just get level six
too late, I'm at ten!

specific scanner-blocking cloaks would be good, so we could split it up so that you have to research the techs individually, but each one area will give you general cloaking against all, but of a lower level.

Ie. research active-cloak V, get active cloaking lev 5 & general cloak lev 3