SIEGE: World War II: How to Unlock and Equip Perks in Expeditions

To unlock and use Perks in SIEGE: World War II, you must clear objective-based player-versus-environment (PvE) stages in the Expeditions mode to earn Perk tokens, specialized currencies, and upgrade components. Once unlocked, Perks slot into your battlegroup loadouts as continuous passive modifiers, giving your active troops and tactical cards specific stat enhancements during battles.

How Expeditions Work

Expeditions serve as an alternative progression mode to standard player-versus-player (PvP) ladder matches. Instead of dueling another player's deck, you face pre-set computer-controlled defensive lines, fortified bunkers, and scripted waves of armor and infantry.

Key mechanics of the mode include:

Staged Progression: Difficulty increases as you advance through an Expedition campaign, featuring heavier fortifications and denser enemy waves.
Attempt Limits: Expedition access and stage attempts operate on regular reset timers. Unused runs do not carry over to accelerate future resets, making it important to spend attempts before they expire.
Progression Rewards: Clearing stages grants Perk slots, Perk tokens, and the upgrade materials required to level up passive bonuses across your profile.

How Perks Function in Combat

Perks are passive enhancements assigned directly to your general loadout. Unlike active Operation cards—such as Air Strikes or Artillery Barrages that cost deployable supply—equipped Perks remain active automatically without spending resources during a match.

Because Perks act as permanent stat modifiers for the duration of a duel, their effectiveness depends on matching their bonuses with your deck's primary combat role:

Perk Category	Primary Tactical Benefit	Recommended Deck Focus
Infantry Reinforcement	Increases infantry health, deployment speed, or movement	Swarm decks, forward capture squads, and rifleman-heavy rosters
Armor Hardening	Increases vehicle survivability and damage reduction	Axis or Allied heavy armor pushes
Tactical Logistics	Accelerates supply generation or shortens card cooldowns	Spell-focused decks, air support, and artillery bombardment
Defensive Fortification	Increases bunker health and defensive turret damage	Attrition, defensive turtling, and counter-attack strategies

Tactical Steps for Clearing Expedition Stages

AI waves in Expeditions deploy pre-positioned formations and steady reinforcements. Standard aggressive PvP tactics often fail due to attrition. To clear difficult stages efficiently:

Preview the Enemy Composition: Check incoming waves before spending an attempt. If the stage relies on armored spearheads, pack dedicated anti-tank units; if it features dense infantry, add area-of-effect suppression.
Anchor Lane Chokepoints: Deploy units near bridges, trenches, or natural lane bottlenecks so hostile AI units cluster into concentrated firing zones.
Protect Durable Frontline Units: Lead pushes with high-durability armor or fortified infantry while keeping damage-dealing ranged units positioned behind them.
Hold Operations for Reinforcement Waves: Avoid spending full supply bars on uncoordinated early pushes. Save heavy artillery or air strikes to wipe out dense computer reinforcements instantly.
Counter-Attack on Supply Advantages: Let the enemy break against your defensive line, then push into their open headquarters while their supply is depleted.

Assigning Perks to Your Battlegroups

Once you unlock and upgrade Perks using Expedition rewards, audit your active decks to ensure your passive modifiers align with each deck's win condition:

Allied Air and Artillery Decks: Equip Tactical Logistics Perks to shorten support card cooldowns, maximizing the frequency of precision strikes.
Axis Heavy Armor Decks: Equip Armor Hardening Perks to keep expensive tanks alive longer against anti-tank fire, offsetting their steep initial deployment cost.
Aggressive Frontline Decks: Equip Infantry Reinforcement Perks to increase foot soldier speed and survival, allowing squads to capture forward ground before enemy defensive turrets establish range.