There were five basic hero archetypes, which affected a character's power choices and team role throughout the game. Blasters were versatile damage dealers, capable of fighting at short or long range against one or many opponents, but had relatively little health. Controllers were adept at preventing enemies from moving or acting through inducing status effects, as well as possessing pet summons. Defenders turned the tide of battle with weakening enemy attacks (debuffs) and ally-strengthening (buffs). Scrappers were melee fighters with a greater chance of critical hits against tough opponents such as bosses. Tankers possessed great defenses and the ability to take hits for the team, as well as powers to adjust aggro towards them.