So once upon a time there were two guys named Gygax and Arneson, who brought forth Advanced Dungeons & Dragons, great-grandfather of tabletop roleplaying games. And many good times were had. As the years and decades passed, AD&D begat more systems, some by the name of D&D, and many more besides. Yet none felt like crawling through the dungeons of old in the way that AD&D did, and as it faded into memory, some longed for the simplicity and grittiness of those days.
And so began the Old School Renaissance, or OSR, where a bunch of people started making content and homebrew RPGs that felt like AD&D and other stuff in the days when Elf and Dwarf were classes, balance was a shrug of an afterthought, and the save-or-die trap reigned supreme. The GLOG, or the Goblin Laws of Gaming, was the first of these RPGs that I encountered, by Arnold K. of Goblin Punch (a truly fantastic blog). Across the OSRverse, there's a ton of blogs creating homebrew content for or inspired by the GLOG, or assembling their own OSR rulesets - see my sidebar for some of my favorites.
If you're looking for a change of pace from the mass of 5e or 3.PF games dominating the fantasy RPG landscape, I highly recommend it! It's resonant, lethal, and above all quick and easy to run and play.
Who is the GLOGosphere? A primer on a good chunk of blogs with plenty of homebrew content and their own hacks to pour through.
GLOG Classes Master Spreadsheet. We've compiled most of the classes we create on this spreadsheet. Find anything from Acolyte to Zouave, from Many Goblins to the Really Angry Goose.
Ok but how do your classes work?
It's pretty simple. Get template A at level 1, B at level 2, and so on. If you want to multiclass, just grab template A from the class you want, then B when you level up again, and so forth.
Like most OSR games, GLOG uses 3d6 down the line for stats. Each race has a stat that they get to reroll and take the result of instead if it's higher, so if you rolled poorly in that at character generation you have a chance to do better. They also all have one perk, and one drawback.
Wait what about these spells?
They're levelless! In the default GLOG, casters have a number of Magic Dice determined by their class, which they can expend to cast their spells at higher power. Just replace all instances of (dice) with the number of Magic Dice you put into the spell, and all instances of (sum) with the total you rolled on the dice you spent. I have my own set of spellcasting rules that scale both power and potential for chaos the more spells you cast, which are baked into my homebrew GLOGhack, Mimics & Miscreants.