Greed is an absurdist osr system about a series of small dimensions burning oil to stay alive. They get this oil by breaking into a dungeon realm. It all reminds me a little bit of Wooden Ocean.
The PDF is 69 pages, with clean, osr style layout and a lot of appropriately weird black and white images. The text is cleanly presented and easy to read, however some headings are split across multiple pages. This is a book you probably want in physical form, but the PDF works fine.
Rules-wise, the core roll is xd6, take highest. A 6 is a clean success. 4--5 is a complication. You have two actions per turn in combat, and the game uses some neat randomized clocks---each clock is a die, and if it rolls 1--2 it decreases in size until it's ultimately used up. Your HP (Ego) is one such die.
Some other basic rules that might seem odd are that you can run multiple characters at the same time, earning XP with any of them and spending XP on any of them. Also, you get XP by spending money or dying. And you can spend money by drawing on a line of credit, which you improve by investing in better homes.
There's also a highly detailed luck, sin, and tattling system, which I don't think I have the space here to fully explain.
Character creation is simple, and the classes are diverse and flavorful. If you like Troika or any of the weirder Mork Borg fan classes, you'll like them.
The book's tone throughout is a little zany, but everything is explained clearly. Like, your stats include Haut Monde and Yare, but you can glance at the section and know immediately how to use them.
There's a lot of worldbuilding in Greed, and everything fits together consistently, but if you like very concrete, very literal settings, you might have trouble with this one.
For GMs, this isn't a hard game to run if you can attune to its setting. It feels like it really needs to be grounded a little bit so that players know what to interact with and what kinds of things to narrate, but if you can do that the game glides. There's plenty of npcs, items, tables, and the like.
Overall, this is an extremely inventive, weird, and exploratory osr game. If you like strange settings, this is one of the best. If you just want to fight a rat in a tavern, Greed might not be for you. I definitely recommend it to groups that are looking for something different, but still enjoy the mechanics and style of play of the osr.