That's pretty much it, they're for the most part strongly D&D flavoured RPGs with relatively simple mechanics. They're in many ways more inspired by pre-AD&D ed

That's pretty much it, they're for the most part strongly D&D flavoured RPGs with relatively simple mechanics. They're in many ways more inspired by pre-AD&D editions of the game and partly a reaction to the complication of the game and move away towards general skill mechanics in 3rd Edition. The designers of the 5th edition of D&D consciously took on board some of the attitude and game design culture of OSR.