This and Zeus (win 500 games) is pretty repetitive, but easily doable. I did this by playing online and double boxing with an alt.
Setup: Online, Host, deathmatch, 1 kill, 0sec respawn.
All you want to do is have your Main kill your Alt, win the match, click same map, and repeat!
At a slow pace (Waiting on Synchronizing/"same map" screen 10sec wait and load) will take about 20sec total. So should take 20-30min to complete this achievement!
TipsCurrently, the achievements don't track, but you can check how many games you've won on the main menu > profile > cn_RT and scroll down on the left panel and you'll see your game stats.
- Make sure to hit the "same map" by hitting cn_X so it doesn't send you back to the setup screen where you have to put in all the data again.
- You can probably get more games in if you are hitting "same map" instead of waiting out the 10sec countdown (my alt setup was in a different room so I just waited out the countdown).