There are 3 different game modes:
- Deathmatch: A Free-For-All game where you can play against up to 11 players.
- Radio Transmission: A team based mode that plays similar as Domination in the COD series or Conquest in the BF franchise. To get points, you need to capture at least 2 'flags'; in which the second one needs to be the middle one.
- Team Deathmatch: Same as Deathmatch, with one difference: it's team based
This achievement does unlock in Private games (thanks https://www.trueachievements.com/v+EnforceR+x.htm
Whilst boosting this, you might unlock the following as well: