GB Corp

GB Corp. is an incremental / idle game for the Game Boy, that rewards you for playing it on several console models.
The core gameplay is quite simple. You hire consoles from the Game Boy line (Original GB, GB Pocket, GB Color, Super Game Boy 1 or 2, Game Boy Advance), and they work for your "push-button" company. When you have earned enough money, you can hire more employees, and upgrade the ones you have so they bring back more income. Also, you must be careful of their power levels: change the batteries of your employees when they are empty!

While the concept is quite simple, this game also has a unique feature: the consoles you hire are effectively working only when you run the game on the same console model! So, to put your GBC employees to work, you need to play the game on an actual Game Boy Color (or set your emulator to "GBC mode"). If you want to make your GBP employees active instead, you'll have to unplug the cartridge and put it into a Game Boy Pocket from your collection (or change your emulator settings). The game uses a SRAM save, so the game progress is kept while switching consoles.

This "console change" is a real gameplay mechanic and not a simple gimmick. When you only have a handful of employees, changing batteries isn't a burden. But when you employ dozens of them, it costs loads of money. However, when you switch from one console model to another (say, you switch the cart from a GBC to an original GB), all the active employees get a new set of batteries for free!