Depends on your system. I've not actually played a TTRPG where that's how crits worked. I believe that's how it works in PF2E, though, which I really wanna try. Just can't manage to convince the nerds I play with.
Pathfinder. For people that play D&D and think “I wish this had more complicated rules…”
But yes, that’s how crits work in Pathfinder - if you beat the target number by 10, that’s a crit success. Conversely, if you miss the target number by 10, that’s a crit fail.
For people that play D&D and think “I wish this had more complicated rules…”
2e generally has rules that are on par with 5e, or even simpler in many cases, just written in a way that makes them sound like a software development reference text. The number of times I've been "Ohhhh, they mean X! Why didn't they just say so?!?!?"
PF2E's pretty fun. The Remaster makes things a pain to look things up, but that's more on WotC and should be largely fixed in a year when Archives of Nethys finally gets caught up
Add item, status, circumstance (e.g. flatfooted which adjust your AC by -2 or cover which increases it) bonuses and you get the actual result of a check.