Playing Orcs Must Die! 2 Classic Mode. Showing how to beat Finale on Nightmare Mode solo playing as the Warmage. Not necessarily the best way, but it works.
All items / traps in the footage are at tier 3, and with the following upgrades:
Crossbow - Mana regen on headshot
Lightning Ring - Chill on strike
Ice Amulet - Neither
Tar Pit - Slow after-effect
Brimstone - Faster heat
Floor Scorcher - Wider hit area
Wall Blades - Reduced reset time
Pounder - Stun on hit
Decoy - Respawn after downed
Orcs Must Die! belongs to Robot Entertainment.
http://www.robotentertainment.com/games/omd2