Putting this in the MP Section since it is a MP Achievement. Back in the Day probably should be adjusted before Halo CE gets a PC release since everyone on PC will be Keyboard and Mouse making the achievement impossible to get if your PC only. It could also help people on Xbox that don't want to pay up to $180.00 for extra controllers for an achievement. Recommendation would be to change the achievement where you play a CTF game on Blood Gulch with 4 people but you don't have to be on a single Xbox, just invite 3 friends to the game over XBL ( Steam or Windows when the PC version is out) and you'll get the achievement.
[Locked] MCC Multiplayer Feedback - April 2019