Though a minor update for some users, Apple’s Apple Store app (free) has been updated to version 2.6 — the app now lets users receive notifications noting when they’re eligible for upgrade pricing on a new iPhone. Sega’s unpredictable history of iOS releases continued this week with the release of House of the Dead: Overkill - The Lost Reels ($5), a visually unimpressive yet semi-engaging zombie shooting game with grindhouse-inspired…