No it's a Real Time Strategy, and one of the best! Starcraft paved the way for a lot of games based on the three different races you could play and their amazingly equal but completely different styles of play. It's one of the most popular RTS' out there and IMHO, one of the greatest games of all time. I only played the SC2 beta a little at a friends house but I am in awe.
To those players out there, not sure about how I feel with some of the unit changes they made, like requiring an upgraded hive for hydra den, but I'm sure that it's going to absolutely sick just like the first.