@xyzzy Somebody else knowing Avalon Code \o/ The game ideas was pretty good but the execution was bad. It's really unfortunate, it could have been a must have of the DS, but all we got was an average game because of its flaws.
It's again the problem of giving the MC a cheat too powerful with no restraint, making the MC OP or needing to change the rules after that.
And it could easily have restraint with his cheat: all infos but from 1000 years ago; Limit on the number of knowledge/uses; must exchange knowledge (Book eating magician); ...
There is another manga (who got translated at more or less the same time) with a all knowing book but the MC has only 1 HP and the infos are limited (It's more like he had the rulesbook and nothing else) (the title is: Another World Munchkin -Conquering the Dungeon as the Strongest and the Fastest with Only 1 HP-)