Linked Achievements for Gears of War 2

Gears of War 2 made yet another appearance just recently and was said to be getting linked achievements. What exactly are linked achievements? As simply as its name, linked achievements are things you can get in Gears of War 2 for what you did in the original game. Some excellent examples are these right here.

- Complete Act 1 in GOW, unlock Anthony Carmine in Gears of War 2
- Find 10 COG tags in GOW, unlock Minh Young Kim in Gears of War 2

With this new idea for achievements, it brings the gaming community back to experience the good stuff with the original games. It's like completing Halo 2 on Legendary and getting to be a brute in Halo 3 Campaign. That sounds pretty cool to me. I'm just wondering what other linked achievements there will be for the near future.