iPad reviews of the week: Grim Joggers, Infinity Field, Pac-Man Battle Royale, Rooms: The Main Building, Resident Evil 4 (Resident Evil 4 iPad Edition)

Many high-profile iOS games take a lot of flak (often well deserved) for being blatant copycats of existing properties. But although the first two games in this week's feature build upon familiar games, both Grim Joggers and Infinity Field offer truly worthwhile riffs on what we already know and love. And later in this piece, we'll look at a trio of existing titles from other platforms – Pac-Man Battle Royale, Rooms: The Main Building, and Resident Evil 4: iPad Edition – which

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