What means the double sheet icon with a numer next to it ?

[jagged oxide]

Hello !
I play the cooperative Horde mode, and there is a strange icon on the top left of the screen.
What means this double sheet icon with a numer next to it ?
Thanks.

[short crater]

Hey! I'll get back to you in a bit, hold tight.

The double sheet icon with a number next to it likely represents the number of Lore Documents you have collected. These documents can be found while completing missions, and each contains three pages. Collecting all pages gives you a unique bonus perk. You can check the rewards for each document in the Challenges menu, and these perks stack for each party member who has them.

Sources:

• Article: World War Z: Aftermath FAQ

[jagged oxide]

The lore Documents i have collected ? I dont understand. Il have collected nothing.

[short crater]

Lore Documents are collectible items you can find while completing missions in World War Z: Aftermath. Each document contains three pages, and when you collect them all, they provide a unique bonus perk. You can check the rewards for each document in the Challenges menu. These perks stack for each member of a party group who has them. If you haven't collected any, try exploring missions more thoroughly to find them.

Sources:

• Article: World War Z: Aftermath FAQ

[jagged oxide]

I asked ChatGPT this question in research mode, and he had another, much more convincing answer:

Meaning of the "two rectangles" icon in Horde mode (World War Z)

Resource points (Horde mode currency) – the icon represents the total number of points accumulated by the player. These are the "score" points each player earns by completing waves and can spend them to purchase defenses, weapons, and other equipment.
Distribution and use – each wave allocates a fixed number of points and shares them among the players. These points can be spent on fortifications or support items, which explains why each player sees a different total throughout the game.

This is not a threat indicator or a multiplier – this value is not linked to damage dealt, contribution level, or a score multiplier, but simply to the player's point balance (their Horde mode "currency").

In short, this is the number of resource points the player has collected in Horde mode (which can be used to purchase defenses/equipment). Official game discussions confirm that each wave awards points that are distributed among players, hence the variable values displayed under this icon.

Sources: Explanations of resource points in Horde mode on the official Steam forum.