Ultraviolet Grasslands bundle is a set $18 for various works by Luka Rejec and his WizardThiefFighter Studio.

• Ultraviolet Grasslands 2022 ($25) - this version adds another 52 pages of material
• Ultraviolet Grasslands 2019 ($25) - the original version still sold at the original price

• Synthetic Dream Machine ($7) - character generator and rules system suitable for UVG
• The Memorialists - Dead City Memories v1 (PWYW) - "a sandbox set in a vast city being despoiled by an invading army"
• Magitechnica ($7) - "powers and rules and spells for use with the Synthetic Dream Machine"
• Zoa of the Vastlands ($5) - "creature generator supplement for the Ultraviolet Grasslands"
• Rrypo: Get the Head ($7) - "rules-loose science fantasy RPG module, compatible with Ultraviolet Grasslands"

• Let Us In ($5) - "16-page system-neutral one-shot horror adventure,,,a scenario straight out of a classic 1970s horror flick"

In summary this is an RPG that can be used for the Ultraviolet Grasslands campaign setting so that you don't have to use another OSR RPG to run it.

I have UVG 2019 and even if you discount Let Us In that's $18 for $51 of product so not too bad.