"Mass Effect 2" allows the player to select from six character classes: soldier, engineer, adept, infiltrator, vanguard and sentinel. Each class has strengths and weaknesses.
Soldiers focus entirely on combat and use the full range of guns available in the game. They gain the Adrenaline Rush and Concussive Shot abilities but have no biotic or tech powers. Engineers mainly rely on tech to take control of enemy drones and security. Adepts mostly use biotics, the game's equivalent of the Jedi Force. Infiltrators combine combat and tech abilities with an emphasis on stealth. A vanguard is a soldier who also employs biotic skills at the expense of some weaponry and armor. Sentinels use biotics and tech but are not very good with guns.