[ GAMEPLAY ] Added Casual game mode.
[ SHOOTING ] Fixed rare cases where bullets would not follow spray pattern.
[ MAPS ] Added Nuke to Deathmatch, Casual, and Competitive game modes. Added Office to Deathmatch and Casual game modes. Removed Mirage.
[ AUDIO ] Added distance effects to all positional sound sources. Improvements to 3d sound processing. General mix tweaks and improvements.
So how many weeks of Mirage was that? Multiplied by 5 = CS2 launch window?