Unconventional warfare is a nice way of putting it. When I saw the theme, I thought about the people who fight with bombs. Checkpoint puts you into their shoes. You have an explosive vest, a vendetta, and no other options, as far you can see.
Obviously this could be massively offensive, so please keep in mind that I only had 48 hours to make it, so I couldn't think through everything. I still managed to slip a some subtle things in, but I'd really appreciate feedback on how this game could have a "better message," and what that might mean.

There are three characters, each working somewhat differently.
From the left:
The Smooth Talker can convince guards that they are friendly, as long as they stand near to them for a second or two. They detonate by pressing Q or E.
The Brute is horrifically resilient, taking bullets in stride...to a point. She tears anyone she touches limb from limb, and detonates on death.
The Runner has two bombs, one in each hand. Drop the left with Q, drop the right with E. They will explode a few seconds after being placed.

All of them move around with WASD, and run with SHIFT.

Once they die, you'll be taken back to the hideout, they will however remain dead. You can hit R at any time to restart a level, but once you leave, you cannot return.

Your goal is to destroy the occupying soldiers in green, but there are innocent people everywhere.

CLICK ONE THE THE CHARACTERS TO START
I PROBABLY COULD HAVE PUT SOME MOTION IN THE MENU SCREEN SO THAT IT DOESN'T LOOK EXACTLY LIKE THE MAIN SCREENSHOT BUT I DIDN'T
WHOOPS

Play on the web, or download for windows. Source and Windows version are at the bottom of the (download) page.