Of only two in-faction Killers, Cerberus "Cuj.0" H3 is the one without fixed strength, which means it's range of usability is greater. But is it, really?...

At ICE strength 0, there are exactly three sentries (excluding variable Dracō): Pup, Rototurret and Burke Bugs. Cuj.0's ability to pass the first two effectively for free is noticeable, but that's virtually it - Mimic's got covered all the other Sentries up to strength of 3 with better efficiency (or at least not worse), with possible exceptions of Komainu and Tsurugi.

So it's real hunting grounds are Sentries with strength of 4 or more, especially those with more than single subroutine - the top stars here are of course Ichi 1.0 and the dreaded Archer, with an occasional Shinobi here and there. But it costs 6 to fully pass trough an Archer and 8 to deal with Janus 1.0! And you can do this only twice! Is it really worth it?...

Definitely. The most efficient Killer to date, Faerie, is single use and costs 3 influence. In builds making extensive use of Shaper shenanigans, three inf is huge. Cuj.0 fills the same niche in Anarch decks, and while it has less base strength, it can be used up to four times and it's higher cost has advantages - Faeries quite often fall prey to cheap Power Shutdown. And while sometimes it is overshadowed by D4v1d, remember, that David will drive you through the Archer once and Ichi 1.0 will make laughs of it - while the dog will eat them both and still be hungry for more!

While it's role is rather as a supportive breaker, not the main gun, yet within decks built around infrequent, high-impact runs (like deep RnD digs) it can be incredibly powerful.

Cute, little marvel. One of the four in-faction Decoders and the most cost-effective. Comparing to others, it is in most cases cheaper to operate than Peacock and more persistent than Cerberus "Rex" H2 (I'll take a liberty of not mentioning the Leviathan...). Most notably it deals easily with Quandary, Enigma, Datapike and Viktor 1.0.

It is restricted to use on centrals only, so there is natural urge do pair it with Datasucker and compare to Yog.0, but there are good reasons not to underestimate it:

• the most obvious and the most important: Lotus Field. Popular Yog's bane falls prey to this humble little Decoder.
• Inazuma, Viktor 2.0 and Tollbooth: popular and dangerous high-strenght Code Gates - still expensive, but totally passable, even without DS tokens.
• cost: you can drop Passport on the first turn and still have cash to trash Caprice behind Enigma Or go aggressive Maker's Eye. Or pull out The Supplier after successful steal from behind Quandary. Or...

Now, there are two more comparable Decoders worth mentioning: ZU.13 Key Master and Refractor. First, while Refractor is deadly effective, it requires specific deck build to work. It's of the same base strength as Passport, so without stealth credits it's marginally better at the cost of influence. ZU on the other hand has one less strength, which adds up throughout the game. Though with the upcoming cloud-based icebreakers, it can be more interesting in the near future.

In summary: for a persistent central pressure it is a weapon of choice, saving up influence and precious Rex's counters, better spent elsewhere.

When comparing this to Ninja (similar cost, in-faction Killer) it looks quite good.

• There are six Sentries with strength of more than 5, one of whom is multityped (Orion). Boosting both breakers to match costs 6 (exception - Janus 1.0 and Orion costs 8 to match with Alias).
• Alias is slightly more economical with breaking low-strength Sentries, most importantly at strength level 3 and 4: Architect, Data Raven, Neural Katana, Ichi 1.0, Information Overload. It also goes through Komainu without additional boost.

With all that said, Alias is usable on central servers only. That means it pairs nicely with Datasucker. And with that, Mimic is all the Killer you want...

At the same install cost, Mimic handles Sentries up to 3 strong, 4 with Datasucker (so the most interesting range) without additional costs and breaks through remote servers. With added support of Faerie it manages on it's own in most important cases.

That means Alias is usable only when you are too tight on influence and/or memory to handle Mimic/DS combo (eg. Iain) and aim to pressure centrals. That makes it very focused specialist, with only but a few decks to fit in. And even then, it is a fair warning message: "If you need this, rethink your deck."

The biggest advantage of Wyrm is being a cheap AI. It can be used to pass early Chimera /Quandary/Ice Wall, if the Corp choose to rush an agenda or secures an HQ from fast Siphoning. It works wonders in early game. After the first two - three turns it can perform some fancy combos with Atman and Parasite (quite spectacular in some cases), but mostly that's it. Oh, and it can pull your sorry ass out of troublesome traps too.

After that, Aesop would happily pet it ;)