Starcraft 2 swarm queen
Kerrigan is on-screen for both of these missions as a hero character, with some neat tricks. Matters are complicated by two external factors mighty snow storms that at first dangerous, but later, let you attack the Protoss with impunity as they hide from the cold behind their shields, and giant yetis. Before they get the word out that Kerrigan is back, you have to shut down and destroy their communication towers – against a fifteen minute countdown.
You're first sent down to the planet to investigate another errant queen, but discover she's been murdered by Protoss forces. The second mission in the demo sees the Zerg facing down Protoss on a slippy slidey ice world.
On Charr, there are over 100 pre-fertilised eggs that can be instantly hatched. A Zerg queen, separated from the hive mind, has begun to construct her own Swarm. The first mission we played takes place on Charr.