The Temple of Elemental Evil is an RPG from 2003 developed by good old Troika Games. This is a Forgotten Realms game just like Baldur's Gate, Icewind Dale, Neverwinter Nights, and all are based on Dungeons&Dragons rule set. A fantasy realm of Faerun is where all those games take place in and where I've spent many fun hours. Temple of Elemental Evil was not your typical D&D game, mainly because every battle was unique and you had to prepare accordingly, therefore game wasn't very forgiving as other games I've listed above were. Our adventurers begin their adventure in a small town of Hommlet troubled by the nearby ancient temple filled with all sorts of horrors and riches.
You can create a party of five classes based on D&D 3.5 rule set, you could create standard classes like Clerics, Druids, Fighters, Rouges, Mages, Rangers and more, and you could also create a multiclass character. Take you pick and go clear thematically four different elemental wings of the temple, each wing giving specific challenges and traps you need to overcome. Game also used more modern graphics engine at the time that was very eye pleasing, however, there were a few shortcomings to this game and those were a short game length and I guess difficulty for some, other than than Temple of Elemental Evil was and still is worth a playthrough.