All Game Modes Work and are very active (Conquest and Rush are the most active) including all dlc maps and hardcore modes. Vietnam is currently being worked on and will be working very soon. Bad Company 2 online is compatible with 3 different DNS servers in case you have trouble with one and works with all hardware including emulation.
https://i.redd.it/vfluji5x6pth1.jpeg
Source: r/PS3 · by /u/Past-Use-4306