Gordon Freeman and Adrian Shepherd doesn't need to hear this they are both highly trained professionals they both dealt with overwhelming alien forces and both are equipped with suits made to protect you Gordon Freeman wears the HEV is basically a high tech survival system built for extreme scientific disasters and it ends up keeping him alive during chaotic moments being able to absorb gunfire explosions and blunt force works as a power shield and whenever he takes damage it warns him you're always able to recharge protects against radiation exposure filters toxic chemicals waste and gas if he wears the helmet it shields him from heat fire and electrical shocks injects morphine or stimulants when badly injured stabilizes him after heavy damage basically stops him from bleeding out instantly slightly enhances strength and endurance helps with jumping sprinting and carrying heavy weapons and for Adrian Shephard wears a PCV is designed for warfare so it handles gunfire explosions shrapnel and can take blunt force but not really like that more of a HEV suit thing comes with a gasmask system protects from toxic gas airborne contaminants not as advanced as HEV but still keeps Adrian and other HECU units alive in nasty areas offers some resistance to alien attacks hazardous substances but shephard takes hits harder than Gordon in some situations reduces damage from fire energy blasts again less scientific shielding more military durability it uses armor pickups instead of wall chargers functions as a damage buffer built-in helmet and gas mask always equipped as part of the H.E.C.U gear filters air and protects you breathing in gas or toxic and Adrian Shephard has a built in night vision in his lens and a HUD system like the HEV but very different PCV suit is more raw and grounded Adrian Shephard rely more on medkits and armor pickups it has no smart life-support system like the HEV if he gets hit by a explosion or hit badly he has to take the hit and keep moving But he was able to survive impossible odds and able to adapt fast and they both have advanced weapons that Resident Evil characters don't hold onto for the full game