Actually, it's very, very easy to make a bad build. Try creating a character with no points in melee. I did it. It's the worst rpg experience I've ever had until I hit level 11. Dropped weapon, miss, critically injure yourself, repeat. Even having 1 point in melee is horrible. Think I created an elf beauty with an 8 st and an 8 dex.
sup, Avellone
if you make a character without melee, maybe fighting in melee combat is a bad idea...
No shit. But there is a very predictable, boring sentiment that pervades every thread on this game. That is, separating meta knowledge from first time player knowledge. There are at least 10 character backgrounds that can severely gimp the beginning of the game. It adds artificial difficulty that you or I would see having played the game, but any other player may not quite get it. "Hur, you can't create a bad build because people who never played the game before would know to spam harm if they didn't go melee!" That kind of idiocy more or less runs rampant in these threads.
Plan out any build and allocate your initial 5 points and background, but plan on being non-melee. Plan on being a charmer, or a sneak, or a thief, or a bow type fighter. See, that kind of thinking may connect with what I call "rational people." Sure, there aren't any here, but I'm just picturing someone buying this game off of GOG based on rave reviews. They structure their player around sneaking. Now, they can't get past 2nd level, and when traveling between towns, Virgil is killed every time and they can't escape combat.
I finished the game the first time just cranking pure melee, just because I like two handers. But, on a lark I created a non-combat, non-harm character. It was fucking awful but getting out of Shrouded Hills was a breeze with about 3 different ways out.
It's also very easy to get stuck in Shrouded Hills with even a good combat build. That is, when trying to get past the first gate.
Fallout 1 makes almost any build possible, Arcanum, not so much. Dumb to say it's impossible to make a bad build. Its very, very possible.