Kiwix is probably the easiest way.

I’m sorry you don’t think people are being helpful but I don’t think the replies are useless, they just aren’t what you want to hear. This is a bad idea, have you considered what would happen if you get caught? You’d be lying on a government form, the TSA can fine up to $17,000 and potentially limit you from flying (which sounds necessary for your career). It’s up to you to choose but I would much rather ask my company to waive the requirement and explain why you feel that way before taking a risk like that.

I have a Milton Bradley Microvision from around 1979, the first handheld game system that used cartridges. I have the block breaker game, it still works but I think some components are wearing out as the game speed feels way too fast. Thing takes 2 9V batteries!