In Neal Stephenson's Cryptonomicon, the protagonist is locked in a prison cell with just a laptop for company. He figures out a way to work on his computer without letting anyone spy on him: Instead of using his monitor, he hacks an LED on his keyboard to communicate by blinking in Morse code. If you think this is a neat trick, and if you don't think an incredibly limited but clever interface isn't a problem, you may fall into the tiny niche of players who would enjoy Hacker Evolution, an indie hacker sim from a studio in Romania.
Former intelligence agent Brian Spencer has to solve a mystery by hacking into corporate servers and tracking down infiltrations and trojans. Along the way, he partners with other hackers, helps himself to cash from banks, and bounces through every defenseless server he can find. Almost all the action takes place in a command-line prompt, where DOS-style instructions like "decrypt terminal-85.xenti.com" lead to nail-biting suspense as you wait to see whether your CPU can crack a password faster than your victim can track you down.