Complex sentence: In the "Dungeons & Dragons" roleplaying game, orcs are a primitive race of barbaric humanoid, largely based upon the orcs appearing in the works of J.R.R. Tolkien.
Split into simpler sentences: In the "Dungeons & Dragons" roleplaying game, orcs are a primitive race of barbaric humanoid. The D&D orc is largely based upon the orcs appearing in the works of J.R.R. Tolkien.