Zombie Army Trilogy is basically a Left-4-Dead style multiplayer zombie-shooter. There's plenty of campaign to play either solo or with friends. There's a bit of fog that prohibits long-distance rendering, but it adds to the game's creepy vibes. The music is okay, but there's a limited amount of sounds the zombies make, so you'll hear the same sounds again and again.
Overall: 7
Graphics: 8
Gameplay: 7
Audio: 7
Story: 7.5
Originally, my review said 7.5, but I took half a point off because the box has confusing messages about "2-4 local play", and says "1-2 players" in docked and tabletop, implying a split-screen mode, but there is no split-screen option. You must have one console per player, and "local co-op" mode is on the same wifi\LAN, not the same console.