So I just finished Thunderscape: World of Aden.
The game is only diffcult in the beginning, the first quarter of the game (my estimate). I made only one character at the start, only relying on party members I could find. When I got the the last keep level (level 5?) I realized that I need more help, read some walkthroughs and I backtracked, went to the factory level and got the golem, then went back to the Keep and somehow finished it. After that I just powered through. Late in the game I replaced that one character I made with Ashak. Maybe not the best choice as the character I had made was the only one with had good scores in Lockpick. Oh well, I got Tophet to pick up the slack by increasing Lockpick. So I finished the game with Ashak, Golem, Bert, Drazil, Arghaan and Tophet.
The "upgrade" to the Golem was more of a downgrade, it lowered it's HP, removed Axe/Mace skill and gave it Bows, Guns and Martial Arts. What a ripoff.
The engine is quite advanced, way ahead of the Doom Engine and the Build Engine. There's Room Over Room and level architecture can make stuff like tables, bridges, etc. If the source code was realeased and someone made a source port of this... but that's probably not going to happen.
The jumping in this game is somehow worse than even the jumping in the Ultima Underworld games.
The game has somewhat good level design, but it suffers due to lack of variety in textures and lack of "decoration". As I understand it, this is partially due to technical limitations, the game crashes if there are too many sprites in one place.
The game suffers from a lot of bugs unfortunately. Levels and save games can easily get corrupted. I played through the Catacombs level and only after backtracking later in the game did I realize that the Catacombs level had been corrupted.
The combat... uhh. I wish there was some more tactics to it. It's just choose the best attack and reapeat untill the enemies are dead. The only difficult enemies are those that instakill your party members, I feel it would be better if we had more protection spells (is "hard counters" the correct term?) and more enemies would do attacks that are difficult.
Basically the respawn rate of enemies get insane in the last quarter of the game and it's just tedious, the combat isn't diffcult, it's just incredibly tedious, annoying and boring.
Oh well, in conclusion... is it a good game? I don't know. But it certainly had the potential to be a great game.