Some champions I've seen way too much of. Others, not at all. It feels biased and unrandom. I know randomness can cause that effect, but it's noticeably different without much variety. If it truly is a biased selection system, why even call it all-random?
Maybe people used reroll often in champ select.
I keep seeing threads like this and the thing about chance is it has no memory (unless you program it in). Just because you got Karthus last game does not change the percent chance of getting him next game. The chance is exactly the same.
Add to that rerolls and there are some Champs you'll hardly ever see in game because more often than not people reroll them, and other picks people are more likely to keep than others.
Plus, even if you own all the champions, most people don't. Because you can't get duplicate Champions on the same team, your chances of getting certain more common Champions are even smaller.
Lately it doesn't feel all-random I went up against too many people yesterday who had mastery 5, 6, or 7 on champions that are supposed to be "all-random"
Sometimes, Rito needs to unload their stress, so they troll players by giving us ARURF. The RNG isn't so random at all.
I've felt this somewhat. It's likely Pseudorandom - random, but with some basic rules to make it a bit more coherent. A lot like how some survival games are: The world is random, but it still has rules that it follows to make sure you can survive.
Now. I obviously have no way to prove this. But the obvious rule is this:
And here are some basic trends I've noticed:
If someone dodges, you're likely to get the champion you originally had, if you didn't reroll them. Most of the time this doesn't happen, it's because someone else got the champion.
If someone's champion pool entirely overlaps with yours (you own every champion they own, and then some), it's slightly more likely to give you a champion they don't have than one they do.
It attempts to somewhat balance out the teamcomps. It's unheard of to see 5 of a single class in a game. The worst I've seen is 4 mages and a tank.
It tries to not overload a team with crap champions.
It tries to not initially overload a team with strong champions. (However, rerolls are unaffected by this).
And, let's not forget: People can reroll every game or two. Usually, I get 2 rerolls every 3 games. This means a lot of people are rerolling for good champions.
If I'm not mistaken, it uses your currently available champions pool combined with the free champion rotation, similar to ARAM. I've only even gotten champions that I own or were free. I don't have much more than 20 on some accounts and I play with a very similar pool there.
