If you are used to the RTS genre then getting into this game will be fairly straightforward. You start with a fairly small area of available land on which to build, but can expand this area over time. Expanding too far to fast can leave you open to attack, but not expanding quick enough can leave you lacking on resources and stunt your recovery in between defending waves of zombie hordes.
Poor Orcs. They get abused so much in many games, and none moreso than in Orcs Must Die!. They get squished, set on fire, chopped, smashed, frozen, thrown into goo and generally abused to the nth degree. But when it’s this much fun, even the NSPCO (National Society for the Prevention of Cruelty to Orcs) will probably have a great time with this Steam and XBLA title.