If you're fast enough on the draw, you can attach Cheat Engine, enable the features, and then close Cheat Engine before GameGuard has a chance to notice what happened. Then you can play as normal.
EDIT: Since February 21st, they updated the EXE to remove this parameter. You can download the original EXE and restore it. Instructions found here: viewtopic.php?p=337842#p337842
EDIT: Since March 7th, they updated the game to not allow the resurrected EXE method. I suggest instead using emoisback's version.dll proxy found here: [Link]
EDIT: If you do not have a GameGuard bypass, you can use the helldivers2_GameGuardActive table. To use it, launch HELLDIVERS 2. Wait until you're on the ship. Launch the table, and execute the Lua script to attach to HELLDIVERS 2. I recommend just activating Base Scripts then closing Cheat Engine quickly. If you've done it correctly, it will inject the code into memory before Game Guard runs its scanner thread to look for Cheat Engine running. Then you can play normally. I recommend removing the scripts you do not want and then saving the table so that when you execute Base Scripts, it will activate the scripts you want.
EDIT: You will have to source your own Game Guard bypass now.
How to use this cheat table?
- Install Cheat Engine
- Double-click the .CT file in order to open it.
- Click the PC icon in Cheat Engine in order to select the game process.
- Keep the list.
- Activate the trainer options by checking boxes or setting values from 0 to 1