Monsters vs. Aliens

The Beam Bot first appears in Chapter 2 Scene 1. About halfway through the level you will have to fight it. Remember to duck under the green lasers with L2 and to jump over the red lasers. If you hit the lasers you won't get the trophy. When the on screen button commands appear press those to defeat the Beam Bot and get the trophy. There are more Beam Bots in later levels, but this one is the easiest to get the trophy on.