DOOM II (Classic)

The only way (so far) to get this achievement is to play death match locally with 2-4 players. Unfortunately, if you don’t have more than one controller then you won’t be able to get this one.

I don’t know if they will make this game mode available for online multiplayer, but for now it’s local only.

Quickest way to get this is to load up a local 2P-4P death match (depending on the number of controllers you have)

Make the time limit 15
Make the score count 25

Then just grind out 25 kills