I really like tower defense games like Defense Grid (PC only I think), Kingdom Rush, GeoDefense. In Defense Grid I really like 2 of the turrets they have. Meteor has super long range, and does a lot of damage + splash but is slow. The other is the concussion tower, which seems to just spit grenades out in random directions whenever a creep is nearby. In Kingdom Rush I like that towers have a binary level up track, so eventually you upgrade it into one style or the other. My favorite is the mage tower that teleports groups back a bit. What are some of your favorite tower defense games, and more specifically what are your favorite towers?