Spectral Stalkers! Ziggurat World! Lovely Mantirs!

 This book should be a Fighting Fantasy classic. It's so well-written. It makes such good use of the format. It's brimming with crazy ideas.

A bug-eyed but strangely endearing angel creature hands you the Aleph, asking you to protect it. It's not quite clear from whom or what you should do with it, but it IS quite clear that you should avoid the spectral stalkers, scary long-legged phantom creatures that arrive in short order to investigate the dead bug-eyed angel, at all cost.

The Aleph takes you on a random ride through dimensions, each of them a mini game world. You start at the library in limbo, have a talk with the dragon lady at the counter, grab some intel, and then it goes on: In short order, I ended up as a sacrifice for some cult of the undead, a literal pawn in the game of two god-like creatures in the sky, a customer on a pottery market recruited to save a master potter from his own golem, a specimen liberator aboard a space station, an unwelcome guest in a god's dream of a hunt, and several other things. I also had a memorable conversation with a scientist who tried to convince me that there's no such thing as magic.

Just as all of this starts to feel just a little bit to random, poof, I end up on the Ziggurat World, ruled over by the wizard Globus who may or may not be the big bad. I meet the mantir, very nice insect people who herd grazing insect bulls, the vaskind, lovely monstrous amphibians, and the significantly less lovely winged black shadows and ophidians and elegant and deadly silicate snakes.

Fronds of Benevolence

Fronds of Benevolence is the first published scenario for Troika!, and I can't seem to be able to stop singing its title in my head to the tune of the utterly terrible Paul McCartney song "Hope of Deliverance", so thank you very much for that, Andrew Walter, author and illustrator of this wonderful little book!
I recently ran FoB (stop that singing, Paul!) on an open gaming night with a random group of players. We had a blast, getting about four hours of play out of just 3 of about a dozen sites and encounters featured in this slim chapbook due to its general high concentration of weird and adventurous. There are a few structural stumbling blocks in the scenario, but they are more than made up for by the sheer amount of great material.

Troika!

I finally gave Daniel Sell's minimalist gonzo science fantasy rpg Troika! a spin a few weeks ago - running it's first published scenario Fronds of Benevolence, and I am just as delighted as I expected. I've seen its implied setting described as "Hipster Planescape", and while I'm not very familiar with Planescape, I suspect that hits the nail on the head - you might also add that healthy doses of Monty Python, Michael Moorcock and Terry Pratchett might be involved.
Basically, characters are expected to be anything from temple-knights who carry around half a dozen swords to demonstrate their readyness for the end times to a Monkeymonger (comes equipped with 1d6 trained, edible monkeys) or a Thinking Engine (who has to weld it's whorly, strangely-wood like skin back in shape to regenerate). My favourite player background, however, remains the Ardent Giant of Corda:

Every Giant has a different story about Corda, well told and interrupted with tears and laughter, of how they lost it and mean to find it soon enough, but oh, what of today? We should drink and cheer, we'll search once again in the morning!

 This passage not only perfectly encapsulates both the lyricism and the wackiness of Troika!, it also displays how setting is presented in this game. You won't get chapter headlines like "An Overview of the City of Troika" or "A Traveller's Guide to the Humpbacked Sky". Instead you get all of these allusions and suggestions that begin to form the mirage of Golden Barges travelling through said humpbacked sky to countless worlds encased in crystal spheres. When you've read through Troika!, you'll have idea of its cosmos in very broad strokes, and you'll have lots of details (like dwarves being made rather than born, and some of them coming out ill-made, or pocket barometers being the current fad in the city of Troika, even though the city has no discernible weather).
Now, you can either see this as an "Oh my god! You're telling me I'll need to be constantly hunting for the tidbits of information to learn about the setting?", or as "Whatever comes up while we play the game becomes part of our Troika! universe. Whatever doesn't come up doesn't. When something comes up that contradicts something already established, it's either untrue or both of the contradictory statements are true. Suck it up." Obviously, the latter is where the fun lies with Troika!.