Razer is no stranger to mobile gaming, having released two Android-powered phones and several phone controllers in the past. But the new Razer Edge is its most ambitious mobile gaming device to date. Ostensibly a small Android-powered tablet (not, we are assured, another phone), its custom add-on controller in the Kishi style makes it an erstwhile competitor to Nintendo’s Switch. But while Nintendo has always relied on its own brand as a platform, Razer and its partner Verizon are leaning on the emerging power of streaming games to get players excited. Tiny tablet, not a phoneThe core of the E…