Fortitude is a mod that increases chance to resist knockdown effects and increases the shield recharge rate of a Warframe. Knockdown and stagger animations will not be played when a player successfully resists a knockdown or stagger. Stats[] Rank Knockdown Resistance Shield Recharge Cost 0 +10% +25% 6 1 +20% +50% 7 2 +30% +75% 8 3 +40% +100% 9 Drop Locations[] Mission Drop Tables Mission Type Source RotationsorDrop Table Chance[1] Quantity[2] Avg. per roll[3] Star Chart Nodes Nightmare Mode Nightmare Mode Rescue B 15.49% 1 0.1549 See in-game World State Window for active Nightmare Mode nodes Nightmare Mode Nightmare Mode Missions B 15.49% 1 0.1549 See in-game World State Window for active Nightmare Mode nodes Enemy Drop Tables Enemy Drop Table Chance[4] Item Chance[5] Chance[6] Expected Kills[7] Quantity[8] Avg. per roll attempt[9] Sourced from the official drop table repository. See Module:DropTables/data to edit on the wiki. Notes[] May be stacked with  Sure Footed for complete immunity to knockdown Kuva Guardians often ignore passive knockdown immunity granted to the player with these mods. Can be stacked with  Fast Deflection to provide a total of +190% shield recharge rate. Shield recharge modifiers affect the rate at which you gain shields, but Fortitude does not shorten the delay between taking damage and initiating the recharge. Trivia[] Fortitude was added in Update 9. This mod used to share its icon with  Vigor, another Nightmare Mode mod. In Update 13.0 (2014-04-09) Vigor got its own icon. Gallery[] Old appearance Patch History[] Update 34.0 (2023-10-18) Fortitude: Increased the Shield Recharge value from +80% to +100%. Also increased Chance to Resist Knockdown from +20% to +40%. Update 27.2 (2020-03-05) (Undocumented) Removed the blocking animation that used to occur when resisting a knockdown. (Undocumented) Knockdown resistance now also works against staggers. Hotfix 9.4.1 (2013-08-02) Fixes for Constitution mod and Fortitude mod not working as intended. Update 9.0 (2013-07-13) Introduced Collapse Warframe Mods Edit Madurai(Offense) Blind Rage •  Continuity ( Archon,  Primed) •  Energy Conversion •  Gale Kick •  Firewalker •  Hunter Adrenaline •  Intensify ( Archon •  Precision) •  Lightning Dash •  Provoked •  Rage •  Rending Turn •  Transient Fortitude Vazarin(Defense) Adaptation •  Antitoxin •  Armored Agility •  Augur Accord •  Aviator •  Battering Maneuver •  Catalyzing Shields •  Diamond Skin •  Fast Deflection •  Flame Repellent •  Gladiator Aegis •  Gladiator Finesse •  Gladiator Resolve •  Health Conversion •  Ice Spring •  Insulation •  Lightning Rod •  Narrow Minded •  Overextended •  Quick Thinking •  Rapid Resilience •  Redirection ( Primed) •  Reflection •  Reflex Guard •  Retribution •  Rolling Guard •  Shock Absorbers •  Steel Fiber •  Sure Footed ( Primed) •  Undying Will •  Vigilante Vigor •  Vigor ( Primed) •  Vitality ( Archon) •  Warm Coat Naramon(Utility) Augur Message •  Augur Reach •  Augur Secrets •  Constitution •  Enemy Sense •  Energy Nexus •  Equilibrium •  Fleeting Expertise •  Flow ( Archon,  Primed) •  Fortitude •  Handspring •  Heavy Impact •  Kavat's Grace •  Maglev •  Master Thief •  Mobilize •  Natural Talent •  Patagium •  Piercing Step •  Rush •  Streamline •  Stretch ( Archon) •  Thief's Wit •  Toxic Flight •  Vigilante Pursuit •  Vigorous Swap Zenurik Endurance Drift •  Power Drift •  Preparation Umbra Umbral Fiber •  Umbral Intensify •  Umbral Vitality CollapseNightmare Mode Mods Warframe  Armored Agility •  Constitution •  Fortitude •  Streamlined Form •  Vigor Rifle  Hammer Shot •  Shred •  Wildfire Shotgun  Accelerated Blast •  Blaze •  Chilling Reload •  Seeking Fury Pistol  Ice Storm •  Lethal Torrent •  Stunning Speed Melee  Drifting Contact •  Focus Energy •  Rending Strike Companions  Animal Instinct ↑ Chance to roll item within drop table ↑ Amount rewarded on successful roll ↑ (Quantity × Chance) ↑ Chance to roll drop table ↑ Chance to roll item within drop table ↑ (Drop Table Chance × Item Chance) ↑ (1 / Chance), see WARFRAME Wiki:Expected & Nearly Guaranteed Numbers for more details ↑ Amount rewarded on successful roll ↑ (Quantity × Chance), average item quantity on a roll attempt (successful or not)