Shadow Man Remastered

Make sure you SAVE YOUR GAME before going into the fight against Legion. This is at the very end of the story - after you've closed down ALL the pistons in the Engine Block and crossed the engine. Save it again on a second slot just to be sure, then go back to your original slot in case you need to quicksave during the fight.

When you reach Legion, simply allow him to kill you. Don't fight back. It's that easy!

You'll get a cool sequence which is a bit more fun to watch than the 'proper' good ending.

Achievement Unlocked!

Now reload your pre-fight save, and kill the evil bastard for the other achievement and the good ending.