Robokill 2, Mission 10: Upon entering the last room that requires the red key, all the enemies are hidden so as soon as you walk into the room the voice comes on and says Mission accomplished. The game then takes you to Mission 11. You can make some of the enemies appear as you dash over to them but it's too late by then. For a Boss room, it's pretty lame that you can't fight anything in it.

RK2 Mission 10 final room i will play it