[this will be a work in progress - I will edit this list when I get home]
Mutants & Masterminds breaks down immunity between the following options:
Aging - Immunity 1
Critical (presumably critical hits) - Immunity 2
Disease - Immunity 1
Environment (any one type: cold, heat, high pressure, radiation, vacuum) - Immunity 1
Energy (Chemical, Cold, Darkness, Electricity, Fire/Heat, Gravity, Kinetic, Light, Magnetism, Radiation, Sonic, Vibration) - varies by type
Exhaustion - Immunity 5
Life Support (disease, poison, any environment, suffocation) - Immunity 9
Mental Effects - Immunity 10
Poison - Immunity 1
Pressure - Immunity 1
Social (interaction) skills - Immunity 5
Sleep - Immunity 1
Starvation and Thirst - Immunity 1
Suffocation - Immunity 2
Any effect calling for a particular saving throw (either: Fortitude, Reflex or Will) - Immunity 30 (per save)
Special - Immunity 1-10 depending on how common the power/special effect is (bullets would be 5, gravity would be 2, any technological or elemental would be 10)
Immunity 1: a rare power descriptor (such as your own powers, a close sibling’s powers, etc.).
Immunity 2: an uncommon power descriptor (such as chemical, gravitic, necromantic, etc.).
Immunity 5: bullets, cold, electricity, falling, fire, magic, radiation, sonic, etc.
Immunity 10: a common power descriptor (such as all effects with cold, electricity, fire, radiation, or weather
descriptors, for example)
Immunity 20: a very common power descriptor (any bludgeoning or energy, for example).
Some rephrased M&M benchmarks:
Immunity 1 (starvation & thirst)
Immunity 1 (sleep)
Immunity 1 (aging)
Immunity 11 (life support [cold, disease, heat, high pressure, low pressure/vacuum, poison, radiation, suffocation], sleep, starvation & thirst)
Immunity 12 (aging, life support [cold, disease, heat, high pressure, low pressure/vacuum, poison, radiation, suffocation], sleep, starvation & thirst)
Some HERO system benchmarks:
Immunity (starvation & thirst) = Life Support (Diminished Eating 3)
Immunity (suffocation) = Life Support (Self-Contained Breathing 10)
Immunity (sleep) = Life Support (Diminished Sleep 3)
Immunity (aging)= Life Support (Longevity 5)
Immunity to low pressure/vacuum = Life Support (Safe Environment 2)
Immunity to cold, disease, heat, high pressure, low pressure/vacuum, poison, radiation, suffocation], sleep, starvation & thirst = Life Support (Total [45 points])
Immunity to aging, cold, disease, heat, high pressure, low pressure/vacuum, poison, radiation, suffocation], sleep, starvation & thirst = Life Support (Total [50 points])
Immunity to all terrestrial diseases & biowarfare agents = Life Support (Immunity 10)
Immunity to all terrestrial poisons & chemical warfare agents = Life Support (Immunity 10)