In no particular order, from the most expensive to the least expensive.

For some reason, Microsoft thought it would be a fantastic idea to port some of their back catalog to their newer consoles—and not force the publishers/developers behind said games to update the prices.

I'm writing this list to warn you so you don't rush to buy these games when you hear they're available. While it's cool that you can still play these games, the prices they're being sold for currently make many of them borderline scams to anybody hoping to play older games at a reasonable budget. There are a couple of games on here that I would argue are reasonably priced for the amount of content within them, but my rule of thumb for this entire list is that if you were given twenty dollars to spend on your Xbox right now, would you be pleased with spending all of that money on games that are over (or nearly) a decade old because either the publisher or developer couldn't be damned to update their pricing? No. Unless you're hyper-fixated on the game you're buying before you've bought it, or you're buying the game equivalent of Citizen Kane (not currently available digitally!), the answer is almost universally no. I'm also going to argue that one of the things that publishers/developers might point to as giving a game more value, its multiplayer, is a very mixed bag across Microsoft's Back-Compat library. Some games still have their servers running, or an alternative running. But I'm willing to wager that the vast majority of these games either do not have their online services operational or that the communities present for those servers are either niche or non-existent. The "buy two copies to play with your friend" reasoning doesn't give the game more value, either, because then you're paying for two copies of the game. Unless the game supports local multiplayer, that's bullshit.

The baseline I've chosen for this list is twenty dollars. Anything less than that is cute but fine enough. Do note that this list does not account for sales. Sales are not the only times of the year when you can buy video games; they are not a good excuse for bad pricing. One last bit of clarification: since I live in the US, the pricing model you see throughout this list is USD. I don't know if it's cheaper or more expensive in some regions.

All of the games on this list are from the 360 because all of the original Xbox games have enough sense to not charge more than fifteen dollars.