NB! It seems this console command is not compatible with CS2.
Command Profile

NEEDBACKUP

CS:GO

This command makes your character perform the "Need Backup!" radio command sending a message in chat and over sound.

Syntax
needbackup

Description

This command makes your character perform the "Need Backup!" radio command sending a message in chat and over sound.

Syntax And Arguments

needbackup

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Related Commands

enemydown

This command will activate the "enemy down" radio command that sends a voice message and message in the chat.

enemyspot

This command will activate the "enemy spotted" radio command that sends a voice message and message in the chat.

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This command will play the "fall back!" radio command in voice and team chat.

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This command will cause you to make the "follow me" radio command, which plays a sound effect and says "Follow me!" in chat.

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holdpos

This command will make the "Hold your positions" radio command play. This plays both the sound effect and sends a text message in chat.

inposition

This command is used to activate the radio command "I'm in position", which causes your character to say that phrase out loud in game and also in text chat.