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Whenever you break a subroutine on a piece of ice, you may pay 1 cred to break 1 additional subroutine on that ice.

When would I need this card? With most icebreakers, it's 1 cred to break a subroutine.

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up vote 8 down vote accepted

As of right now, there are two situations in which E3 feedback implants are useful.

The first is that it isn't always 1 cred to break a subroutine. Aurora, Peacock, Battering Ram, and Wyrm all cost more than 1 cred to break a subroutine. Two of these (Aurora & Peacock) are the same faction as E3 feedback implants. So it's feasible that you'd save a little bit of money over time.

The second use is against bioroid ice. Bioroid ice subroutines can be broken by spending a click. So with E3 feedback implants any bioroid ice can be bypassed by paying 1 click + 1 cred/remaining subroutine. Which makes things like Janus only cost 1 click + 3 creds.

If there are things added in the future that allow breaking subroutines via non-icebreaker methods, E3 implants would also be useful in those situations.

EDIT: There was discussion about whether or not E3 feedback implants could be used as the triggering condition for itself, so here's a link to a thread on BoardGameGeek where this got answered. (It does trigger itself)

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Beat me by 15 seconds! As an aside, I believe E3 only allows you to break one extra subroutine, not as many as you wish, though I could well be wrong. – Johno Jan 21 '13 at 20:37
Added link to BGG topic that addresses that! :D – EvilAmarant7x Jan 21 '13 at 20:40
Thanks for the clarification! – Johno Jan 21 '13 at 20:42
Also, now there are more other cards that let you break a subroutine (like Grapling Hook, Quetzal or D4vid) that work with E3 feedback implants. – sloth Jun 9 '15 at 15:05

As more cards come out, new synergies will obviously appear, but I think its best use at the moment is against some of the incredibly tough Haas-Bioroid ices which allow the runner to spend a click to break a subroutine.

For instance, Janus 1.0 is a level 8 HB ice and has four subroutines which all read Do 1 brain damage, but allows the runner to spend clicks to break subroutines. It might be very expensive in credits to beef up your icebreaker of choice and break all four subroutines, or expensive in clicks (if you can afford it) but with an E3 Feedback Implants, you could spend one clicks and three credits to break all the subroutines, which is much cheaper.

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I think it's even better than that, 1 click plus three credits to break Janus. (Breaking a subroutine with E3 Feeback Implants triggers a new opportunity to use E3 Feedback Implants.) – thesunneversets Jan 21 '13 at 20:39
Ah, OK. Seems like needlessly ambiguous wording to me, but I'll amend my answer. – Johno Jan 21 '13 at 20:42

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