Konami's title entered the 3DS chart in fourth place behind Mario Kart 7, Super Mario 3D Land and Mario & Sonic at the London 2012 Olympic Games.
Its performance is perhaps surprising given that it has received decent review scores. Snake Eater 3D currently has an 80 Metascore based on 24 reviews, including an Edge 8/10.
Mass Effect 3 debuted at No.1 on the all formats chart this morning. The only other new entries to make the top 40 were Street Fighter X Tekken at No.3, PC exclusive The Sims 3: Showtime at No.6, and Vita exclusive Unit 13 at No.15.