Konami is promoting Metal Gear Online with a monthly series of Survival Challenge events. Starting a week on Saturday - 28th November - players will be awarded Reward Points based on the length of their team's winning streak in Survival games over a 24-hour period.
The next events will be on 26th December, 23rd January, and 27th February. To be eligible you just need to join a Survival lobby in the PS3 multiplayer shooter and play at least one game during the 24 hours; numbers will be capped at around 3000 players. You'll get a Regain in-game T-shirt to prove you turned up on each day, and a Regain hat if you make all four.
"Players are not recommended to play for an extensive duration of time due to health risks," reminds the press release. Play safe, kids.