Project Spark

You just have to play 60 minutes total of community games for this achievement, you don't even need to finish them in any way. Down below in "Community Advocate" achievement Dire Nevermore posted a very useful created game that just runs up the timer while you can go do other stuff; leaving your Xbox controller connected through the USB port so it doesn't goes off by itself in the meantime.

I made this guide for the 100 hrs achievement! So it will certainly work here!

I have also created a map/game for this achievement, plus some others. If you search "100 hrs or 1sec" it should come up. The maker is me "Smoke pr0!"

Plug your controler in so it doesn't turn off and pause the game which would stop your progress. Now you may let this game run for as long as you'd like (1 hour to 100 hrs) However, when you are done instead of quitting, simply walk onto the teleport device. It will give you the game over screen for yet another achievement. You can also rate at this time for Hope this helps