Technically yes, but if your friend does not have the trainer, your game will desync. Both players must run the identical trainer with identical hotkeys enabled.
Many trainers are portable (single .exe). However, they still need to “install” into memory each time you run them. There is no permanent modification. demigod trainer guide install
Published by: ModMaster Guides Reading Time: 12 minutes Target Game: Demigod (Gas Powered Games / Stardock) or comparable demigod-themed ARPGs Technically yes, but if your friend does not