Die Hard (Fallout: Brotherhood of Steel)

Die Hard is a perk in Fallout Tactics and Van Buren. It also appears in Fallout: Brotherhood of Steel as a skill.

Fallout Tactics
You don't give up easily, when your Hit Points get below 20% you get an additional 10% to Damage Resistance.

Fallout: Brotherhood of Steel
Each level of this skill increases your health by +20 (up to a maximum +200) Hit Points. To take it, the player character must be Level 3.

Points requirements

 * 1 Rank : 4 Points (+20 Hit Points)
 * 2 Rank : 8 Points (+50 Hit Points)
 * 3 Rank : 16 Points (+90 Hit Points)
 * 4 Rank : 32 Points (+140 Hit Points)
 * 5 Rank : 64 Points (+200 Hit Points)

Van Buren
Davidson in Van Buren had this perk. Combined with his armor and his other perks, like Toughness, Davidson became quite powerful.

Bugs
In Fallout Tactics; once the 10% damage resistance bonus kicks in, it stays there even if one's HP goes back above 20%. This can be reverted by taking the Toughness perk, however the effect can be re-enabled by letting the HP go back down to 20%.

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