**Early reviews for Adam Wingard’s A24 action-slasher *Onslaught*, which opens September 4, show a divided but leaning-positive critical response that will shape the final Rotten Tomatoes Tomatometer.** With 13 reviews logged as of late August 31, the score sits at 85% Fresh, reflecting praise for the film’s brutal, Carpenter-inspired violence, synth score, and Adria Arjona’s lead performance as a trailer-park sniper facing genetically engineered super-soldiers. Critics highlight satisfying set pieces and genre excess while noting narrative thinness and a scattered structure that may limit broader acclaim. Metacritic’s 55 aggregate (mixed/average from 12 reviews) underscores the split. Additional reviews ahead of the wide Labor Day release—plus any post-opening adjustments—represent the key swing factor, as A24 genre titles have historically seen scores move with wider critical sampling. Traders should monitor guild or critics’ circle precursors and early audience metrics for momentum shifts.