M. Night Shyamalan's The Sixth Sense was simply too massive a cultural phenomenon for other 1990s movies with shocking twists to stand out. Not that they have been completely overlooked or forgotten, but they're always overshadowed by Shyamalan's movie in every conversation about plot twists.
The Usual Suspects, directed by the disgraced Bryan Singer and written by Christopher McQuarrie, was praised for reasons beyond its climax. The movie grossed more than ten times its reported $6 million budget, and earned McQuarrie an Oscar for his tightly plotted script. The Sixth Sense would be released four years later. It grossed ten times as much as The Usual Suspects.