Given this text, summarize the major events in Call of Duty: Modern Warfare 2 game development and release.

2008: Call of Duty: Modern Warfare 2 development began
Feb. 2009: officially announced
March 2009: game testing bagan
Nov. 10, 2009: released worldwide for Microsoft Windows, the PlayStation 3 and Xbox 360.
2014: released for macOS
2018: released for Xbox One
March 2020: a remastered version is released on the PlayStation 4
April 2020: a remastered version is released on Microsoft WIndows and Xbox One