There is a creature in Greek mythology known as the Chimera. The Chimera was an unholy patchwork of a beast, a combination of lion, snake, and goat. Battlefield 3 is the software equivalent of a Chimera—a beast of a game stitched together from disparate parts. Battlefield 3’s single-player campaign is undoubtedly the goat. The game resorts to every dirty funneling trick to keep you on its chosen path, ranging from invisible walls to flat-out killing you and forcing a reload if you wander. You’ll spend much of the game running a high-speed conga line with your AI squad mates, dashing from one checkpoint to the next.