Category: Game mechanics

We are often told that the great thing about OSR is that all of the materials are mutually compatible. The idea is that it doesn’t matter if it says D&D, AD&D, OSRIC, Swords & Wizardy, or Old School Essentials on the cover of the module — regardless you can run it with any of the…

One of the basic differences between modern and old school D&D is whether ability checks are roll high (modern D&D) or roll under (old school D&D). I’m going to bracket various aesthetic issues of which mechanic is more elegant, simple, etc. and only look at the math of how swingy they are and in particular…