The following are known Action Replay Codes for Body Harvest on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

Infinite Greece
81052b180098
81052b1a967f

Extra Weapon And Ammo
810481380203
8104813a0405
8104813c0607
8104813e090a
810481468000
810481488000
8104814a8000
8104814c8000
8104814e8000
810481528000
810481548000

Infinite Health
8104dcec0258

No Humans Killed
8104816a0000