Trainers are intended for the Campaign mode . Attempting to use them in multiplayer will likely result in a ban from anti-cheat systems. The Built-In Alternative: Console Commands
Automatically refills your weapon's magazine and reserve ammo, often removing the need to reload entirely. call of duty 1 trainer unlimited health and ammo
If you prefer not to download third-party software, Call of Duty 1 has a robust built-in "Developer Console" that can provide unlimited health and ammo through simple commands. Call of Duty Cheats, Codes, and Secrets for PC - GameFAQs Trainers are intended for the Campaign mode
Dominate the Frontlines: Using a Call of Duty 1 Trainer for Unlimited Health and Ammo call of duty 1 trainer unlimited health and ammo