I have tight security in my school and almost all the games are blocked, including google sites

online, I'd go to https://minesweeper.online or https://kickassapp.com

not games, but would be a fun thing to try when bored, especially in school http://essaytypewriter.com/ http://nooooooooooooooo.com/ and http://www.staggeringbeauty.com/

offline, albeit limited within the scope of powerpoint capabilities, some were fun to try
https://powerpointcreative.forumotion.com/f5-games

Here, let me help linking that out for you.
https://minesweeper.online
https://kickassapp.com

http://essaytypewriter.com/
http://nooooooooooooooo.com/
http://www.staggeringbeauty.com/

https://powerpointcreative.forumotion.com/f5-games

>>1 Just take a USB and install some games, delete them when you're done.

The boys and I used to host Halo lans in the library

>>5 Damn, that takes me back. In my first year of high school we used to have modded Halo LAN games. It was so fun having the assault rifles shoot rockets everywhere. The chaos was just beautiful.

People without the modified game files would just see vehicles and stuff flying around for no reason- it was hilarious.

And yeah, just download some games to a USB stick. I used to put PortableApps (https://portableapps.com/) on a USB stick to play around with.

Yo thanks for the help but most of the things are blocked lucky write my easy and noooooo are unblocked, thanks anyway!

sorry but the essay one is actually wrong, here's the right link

http://www.essaytyper.com/

You could try a Proxy website to Bypass dumb school Security. Or just do what I did and Log in as the Teacher and give yourself the Same Role as the Teachers Login.