Acclaim and developer Ridiculous Games have announced that the first playable demo for their rhythm-based dungeon crawler GRIDbeat! is now live on Steam just in time for February’s Steam Next Fest. A Nintendo Switch demo is also on the way and is expected to hit the eShop later this month. In GRIDbeat!, players step into the role of a hacker who has successfully infiltrated Knoss.OS—the most heavily fortified corporate network on the planet—and escaped with incredibly valuable data. Unfortunately, getting in was the easy part. Now trapped inside the sprawling Mainframe, survival depends on syncing every move to the beat…