How to enable and disable First Person View Mode

Enable Developer Console

Make sure your developer console is enabled.

You can enable it by going into options then keyboard and mouse.

Open your console using the backtick key (`) or tilde key (~) and type sv_cheats 1 to activate cheat codes.

Using first person view “firstperson; asw_hide_marine 1; asw_controls 0”

Return to original third person view “thirdperson; asw_hide_marine 0; asw_controls 1“