D0 OSR

The D0 OSR is a 1d10, roll under, but as high as possible, system.

Attributes and skills range between 0 and 10+, and each advance equates to a +10% chance of success. There are six attributes, and ten skills.

No world is provided, it’s recommended you create your own, but if you don’t wish to, Moorcock's works are an excellent source, especially the Young kingdoms.