If BioShock Infinite's gruelling 1999 Mode is too easy for a grizzled face-shooter such as yourself, why not take on an extra challenge? The second episode of its Burial at Sea DLC will introduce a new difficulty switch, 1998 Mode, where Elizabeth can only use non-lethal tools.

"In Burial at Sea - Episode Two we put a focus on balance and stealth mechanics," creative director Ken Levine said in today's announcement. "As we were developing this new style of gameplay, we started to see people self-impose non-lethal playthroughs. Given the fan reception of 1999 Mode, we thought it would be cool to give them another way to play Burial at Sea that challenged their mastery of stealth tools."

1998 Mode can be played on any difficulty setting, and even together with 1999. If 1999 Mode was a reference to the year System Shock 2 launched, then 1998 must be, uhh, an early build of SS2 before any weapons were added?

The second half of Burial at Sea will bring back all manner of beloved Rapture figures on March 25. It's Irrational's swansong before the studio is hacked down and all but 15 members laid off.