Doom 3

At the start of the game get to where the monorail station doors are. Follow around to the kitchen/recreation room. The arcade cabinet is in the corner of the room. Punch the turkey until you hit 25000 points.

If you missed this achievement in the main campaign, you can get this a few times in RoE. I don't remember where it was the second time I encountered it but I do remember where the arcade machine was the first time I encountered it.

In the mission Erebus - Level 3, you will come to a room "Sarge's Office" or something like that. You will have to type in a combination to get the Super Shotgun. To the right of this office is another small room where your main objective is. If you get to the part where the screen turns red and a bunch of zombies have spawned, you went too far. Just simply turn around and go back into that other room. The arcade machine is on the door to the left. Very hard to miss!

I found if you mashed the punch button fast enough, you would get 25+ points per punch and 250+ points per kill. Just mash the punch button (Which is I believe) until you reach 25,000 points. It takes a little but, but it's nothing too bad.