Your description kinda reminds me of that mini-game with CLI optic in Enter the matrix where the player "hacked" some databases in order to unlock special game contents or cheats. If you don't know what I mean, try searching on YT for old cheat tutorials or Let's Plays on this game, otherwise justvisit some generic cheating com that's old enough to have EtM in their archives.... Maybe you'll get some inspiration.
However, the concept of that thingy wasn't that bad at all but imho EtM's realization sucked a little; anyway there might be potencial.
On which dev stage is your project atm? Did you already code some of the most basic stuff? Or primarily doing brainstorming right now?
EDIT: Yeah, go for it and post what you have already, I'd really like to take a look
and haha @ "C+-"