Temporarily Block Mac Apps

Hello,

I'm looking to block myself from opening certain apps on my MBP so I don't waste my time playing games instead of working. Think of it like SelfControl (http://selfcontrolapp.com/) but for apps instead of things on the Internet.

I've done some searching but I can only find stuff for blocking websites, but that's the stuff I don't want to block haha. Can you guys think of any ways or apps to do this?

Thanks in advance!