Classic or Reg Criminal was a deck that used good breakers (Paperclip, Gordian Blade or Inversificator, Mongoose & Femme), run-based economy (Desperado, Temujin Contract, Dirty Laundry), credit denial (Account Siphon), and the best multi-access in the game (Medium) to pressure the Corp on multiple fronts.
In its last version, it also had great anti-tag tech (Aaron Marron) and solid card draw (Earthrise Hotel, Aaron Marron, John Mass, Andromeda's ID ability).
The breaker suite remains now, but nearly all the other cards that made this deck strong are gone, so Reg Criminal has been floundering quite a bit. Since the original Core Set, Account Siphon has been one of the defining cards of Criminal. It was a card every Corp had to play around and defend against. Now, it is very common for Corp players to leave HQ undefended because the cards that punish the Corp for that choice just are not that strong.
Here is example of trying to build a Reg Criminal build in the current card pool. I'm not saying it is a good build, but it is an example if you are trying to experiment around yourself.
Steve Cambridge: Master Grifter (Terminal Directive)
3x Career Fair (Breaker Bay)
3x Dirty Laundry (Creation and Control)
3x High-Stakes Job (Kala Ghoda)
2x Indexing (Revised Core Set) [color=#32CD32]●●●●● ●[/color]
2x Inside Job (Revised Core Set)
2x Legwork (Honor and Profit)
1x Mad Dash (Daedalus Complex)
3x Special Order (Revised Core Set)
3x Sure Gamble (Revised Core Set)
2x Doppelgänger (Revised Core Set)
3x Aeneas Informant (Earth's Scion)
3x Daily Casts (Creation and Control)
3x Earthrise Hotel (The Source)
3x Sacrificial Construct (Revised Core Set) [color=#32CD32]●●●[/color]
1x Femme Fatale (Revised Core Set)
1x Inversificator (Earth's Scion) [color=#32CD32]●●●[/color]
1x Mammon (Terminal Directive)
1x Mongoose (Kala Ghoda)
1x Paperclip (Blood Money) [color=#FF4500]●●●[/color]
1x Sneakdoor Beta (Revised Core Set)
3x Tapwrm (Quorum)
15 influence spent (max 15, available 0)
45 cards (min 45)
Cards up to Revised Core Set
Deck built on NetrunnerDB.