Which multiplayer modes are missing?

The released game has no competitive skirmish matchmaking, shared campaign, PvP ladder, or network lobby. Steam also omits the Online PvP, Online Co-op, LAN PvP, and LAN Co-op feature tags. A standard squad can deploy four Operators, but one person issues every order.

This distinction matters when store copy refers to a "squad" or "company." Those words describe the characters under your command, not a party of human players. The separate co-op status page covers local and online cooperative play.

Does the game need an online connection?

Multiplayer support and internet access are separate questions. Zero Company is a single-player game, but PC and console stores may still require a connection for purchase verification, download, patches, cloud saves, or platform services. None of those functions adds a player-versus-player mode.

What one player controls

One commander chooses Operations on the galaxy map, prepares the squad at the Den, selects up to four Operators for most tactical missions, and spends each Operator's Action Points in turn. Bonds, injuries, equipment, and optional assignments all remain part of the solo campaign. The single-player guide explains that loop in detail.

No official roadmap currently promises a multiplayer update. If that changes, an EA announcement and updated store feature list would be stronger evidence than menu speculation or an unofficial mod.