Someone mentioned movies based on video games earlier, and I think that needs to be expanded on, because those are a gold mine in general.
Two words, for instance; MORTAL KOMBAT!
Based on the hit fighting game! Many people consider this to be the least terrible video game-based movie ever made, partly due to its
and lovably hammy acting.
On the other hand, the sequal,
, is unironically considered to be the worst video game-based movie ever made. I don't even know where to begin explaining why.
Alternatively, there's Street Fighter: The Movie, which stars Jean Claude Van-Damme and the late Raul Julia, and was the standard-setter for bad fighting game movies.
And there are so many others, too. Are you familiar with Uwe Boll?