I got a chance to play this at my local arcade and it's a fun, obscure little top-down shoot-'em-up with an appealing visual style and satisfying combat. As is unfortunately common with arcade games, sometimes enemy attacks can be a bit cheap, and there was a boss fight at one point where you couldn't dodge a potent attack, practically necessitating continues. However, the actual shooting is satisfying and rewarding, and clearing each floor in a frantic panic to find the enemy holding a keycard is chaotic in a very fun way, especially in co-op where it becomes even messier (again, in a good way). The additional weapons you pick up can cause some fun destruction but sometimes I felt they didn't do enough to switch up the gameplay loop. The game is clearly inspired somewhat by Resident Evil, featuring an underground laboratory where zombies, bioweapons, and giant mutated animals are commonplace. It wears its inspiration on its sleeve, but it has a surprisingly detailed and elaborate PSX-esque presentation that shines brightly and will make it stand out in any arcade. Appealing character designs and robust technical execution lead to a very good, if not great-looking game, with some particularly impressive special effects. Unfortunately, the arcade hardware just seemingly can't keep up, with performance problems being commonplace and the game often slowing to an absolute crawl as a result. It's not gamebreaking but it is immediately evident when it happens. Nonetheless, Chaos Heat is an entertaining, obscure top-down, Capcomesque shmup from Taito that deserves a bit more attention than it actually gets. If you ever see a cabinet out in the wild (to my understanding they're uncommon) absolutely give it a shot in spite of its flaws.