With the addition of some new units with distinct skills and abilities it is utopic to think that the final product will be perfectly balanced from the beginning, no matter how many tests are in progress, but any minor imperfection can be fixed in the upcoming patches. Speaking of units, Starcraft 2 presents us with some exciting troops that will bring extra flavor to the large scale battles, while iconic units from the previous titles will return unchanged or upgraded with new abilities.

Some of the most impressive units introduced in Starcraft 2 are protoss troops who are now versatile fighting machines capable of launching combined operations that can devastate the opponent's base. Zealots remain the first line of assault but their "charge" ability makes them a deadly weapon against siege units, while the Immortals' hardened energy shield allows them to shrug off the most powerful weapon strikes. Stalkers are another original concept introduced in Starcraft 2, and their ability to teleport across short distances makes them the perfect weapon to annihilate retreating foes.

The Colossus is perhaps the most imposing new unit, its fire power and the ability to step up and down cliffs and other steep elevations giving him the upper hand against incoming enemies. Traditionally dominant in aerial warfare the protoss can rely on two powerful additions, the Phoenix and the Warp Rays that can either inflict damage on a large area around them or focus fire on stronger units and structures to rapidly annihilate the foes. The Mothership is without a doubt the deadliest unit introduced in Starcraft 2, her sheer damage and stunning abilities make it the ultimate weapon in the Protoss arsenal. Nonetheless a player can only produce one unit of this kind and by spending a huge amount of resources, while the huge danger it poses makes it a priority one target.

Formidable foes when holding a strong defensive position, Terrans are always vulnerable on the move and they used to have very little options to launch a successful sneak-attack. In Starcraft 2 we'll benefit from the addition of a very flexible infantry unit, the Reapers who are highly mobile and can easily infiltrate the opponent's base. While the jetpacks allow them to jump across rivers, crevasses, and other obstacles they have low armor and are very vulnerable to defensive structures. Marines remain the cornerstone of the Terran army and with a good control and a few medics to heal them these units are very useful in the early stages of a match.

Banshee squadrons are deadly against ground troops and with no air-air weapons they rely heavily on the cloaking device to escape when encountering an enemy fleet. The Viking is a very versatile unit that can shift from an assault walker to an air-superiority fighter and storm enemy positions, always searching for a weak spot to deploy their deadly arsenal. Speaking of big and powerful weapons we can't afford not to mention the Thor, a formidable war machine armed with two giant particle beams and a dorsal artillery batter. The most interesting fact about this unit is that it can be build from the ground near an enemy base and lay siege to the unprepared enemy.

Zergs are still pretty much shrouded in mystery and we only know that most units suffered "mutations" so we'll have the chance to see traditional units upgraded with new skills that allows them to inflict more damage of to perform special tasks. Queens will play a more important role than in the original title, Hidralisks and Mutalisks have evolved into lethal counter-units against light infantry, while the Zerglings can now mutate into a Baneling. These units are virtually living bombs, fitted with sacks filled with liquid, and a certain chemical reaction performed close to enemy structures and troops leads to a devastating explosion.

Starcraft 2 looks so good at the moment that most people would argue that its launch date shouldn't be postponed any longer, still Blizzard feels that it needs more polish. Hardcore fans may be tempted to blame the company for this delay, but they must remember that Blizzard puts quality first in each and every game released and on the long run this is a winning strategy.