Two old games that might deserve the title "worst RPG":

- Abandoned Places (for Amiga). At that time, it was common to include food and drink, and your party had to eat or they would starve. Unfortunately, the characters in this game had such a ravenous appetite that you needed to spend all the money you earned on food, so you couldn't buy any new equipment, and the opponents you encountered in the beginning didn't drop better weapons or armour, although they did become more powerful. I stopped playing very soon.

- Chaos strikes back (for Amiga), the sequel to Dungeon Master (which was a great game). There were so many teleporters (which you couldn't avoid) that it became very hard to keep track of where you actually were and where you were going. One could say that the game was aptly named, but the developers overdid it so much that the game wasn't fun anymore.

And some newer games that were very bad for one reason or another:

- Daemon Vector. It was included in a compilation I bought, and I had very low expectations. It looked ugly, I didn't feel inclined to play any of the available characters, combat largely relied on combos and reminded me of a brawler, and the few bits of story that popped up were lame. I wouldn't even label it "RPG", and it soon vanished from my hard drive.

- World of Chaos. It could have been a good game with some more balancing and bug-fixing, but unfortunately, fights were frustratingly hard in the beginning, the game often crashed and a bug prevented me from continuing the game after the first few maps. There is a patch and it supposedly fixes this bug, but it still kept me from playing on, although I installed the patch before starting to play. The publisher and/or the developer went bankrupt soon after release, so there won't be any more patches.

- Neverwinter Nights. Probably not the worst RPG, but the biggest disappointment. The game was severely imbalanced, I hated the controls, the story was lame and full of logical holes, you could have just one companion and the AI was annoyingly stupid. I was often tempted to stop playing for good, but completed the game, although the end was also disappointing.

- Throne of Bhaal (expansion for Baldur's Gate 2). Sadly, the best example of how you can ruin a great game's story (great game referring to Baldur's Gate). The tiny bit of story that was left in this expansion was completely predictable, though it mainly consisted of fight after fight after fight, all of them imbalanced. I played co-op with my brother, and the only challenge his paladin faced was to clear the opponents quickly enough before my mage/thief character died. Which still regularly happened because the game designers had the great idea to often teleport the whole party into close combat. Spells were almost ineffective because of the high magic resistance most opponents had, but when my character had a chance to lay traps, no opponent stood a chance to survive. Pen & paper D&D has some flaws with respect to high-level characters, but a good Dungeon Master can keep the game both fair and challenging. Throne of Bhaal utterly failed in this respect and also slowly dragged the story of the series to a predictable end - that's why I would probably call it my personal "worst RPG".