Super Meat Boy Forever

If like me you are just wanting to get this game on your tag, this is perhaps the easiest to do, requiring the least skill. You will get this through natural progression anyway, but can easily grind it out at the beginning of level 3. Punch to kill the first five enemies, then immediately jump up to kill yourself to avoid hitting the checkpoint. Do this for 10-15 mins and this will pop. You can check your amount of kills in "Statistics" from the main menu.