A game is bad depending on what you are looking for. If a game has good gameplay but a bad story, I could still play it (DmC is an example of this). There's also the opposite situation where the story is outstanding but the gameplay is bad (many all-time greats from the 1990s and 2000s fall in this category simply because technology rendered them obsolete) and I play those from time to time.
A game is bad when I can't fit it in any of these two situations (Multiplayer and MMO games are what I particularly consider bad)
A game is bad when I can't fit it in any of these two situations (Multiplayer and MMO games are what I particularly consider bad)