Penumbra Black Plague is better overall than part because more happens in the gameplay. Especially the venues are more varied than in the first part where you forever walking around in the mine and necessarily everything looks the same. Weapons there this time eingetlich not, although they would like to use time against a particular enemy :)
All in all, the mystery well solved and it remains up to the last second thrilling as a horror must (horror triffts better) be -Adventure. Bug-free it was with me until the end.
Conclusion: if you liked part 1, part 2 will love.
PS: In Part 3 I want but at least ne shotgun because I've been waiting all this time it :-)