I distinctly remember playing this on armorgames.com. You went around this house cleansing it (i think) of evil spirits. You could only see them if you wore some kind of mask. You knew where it was when you found a half eaten rat on the floor. I cannot for the life of me find it on the site anymore. I don't remember the name to even know if it still exists anymore. Source: over 2 years ago

Pre-ordered from gametop.com. First time I have pre-ordered from them in years. Hopefully it comes tomorrow and with the bonus item. Source: about 2 years ago

Other details: I dont remember if the game was a campaign or a survival of waves , but it was in a forest with trees on edge of the map , it was night and the mecha might have a flashlight , you fight zombies and I guess some of them was special like tank style zombie , you can pick up or purchase various weapons and selcet between them using the 1-9 numbers , there is that specific weapon I remember called... Source: about 3 years ago

I recently listened to Sabaton's The red baron song, and I was completely hooked, the kind of hooked who kept playing the song on loop for hours, then I remembered that I used to play WW1 dogfight games in the past so I searched for one on gametop.com (used to download free games form it when I was in high school with my shitty 128kbit/s internet) and then I went on steam to see if there are newer ones, and I came... Source: about 3 years ago