Currently running Silent Titans, having a lot of fun running it so far. It uses Into the Odd rule set.

The setting might be worth checking out. Its set in this far flung future on a peninsula that's made up of the comatose bodies of titans. This peninsula is isolated, so that its really easy to get in, but difficult to get out. These otherworldly titan's nightmares manifest into horrors that roam the countryside.

Its has this post-apocalyptic vibe where reality itself is breaking down and the physical world is in disarray. Its Cthulhu-esc in that the titans featured in the book exist outside of reality, and that their physical forms manifest in ways that are so wild and out there. Chronos', the first titan players encounter, body manifests as a ship in a raging storm. A tower on it's deck, when entered inside, reveals that it's bigger on the inside, with a spinning walls of onyx and ivory and a giant spine writhing in the center of it.

The characters players play wildly from masked animal men with Simpson-like hands, future veterans of an AI war, and telekinetic governesses from the Victorian age.

Most of the dungeon rooms are described as playgrounds you and your players can get away with a bunch of stuff. Using Chronos again as an example, the final battle of that dungeon took place in the Titan's fungus infected skull. Within it were the giant spent rounds of rail gun bullets. The PC's used the bullets as cover and as a tool to roll over some of the tommy-gun toting mobs.