Life is cheap: an inexpensive permadeath FPS with anti-war message
TITLE
Game price: 1 cent
What's the catch? You only get one life.
You are thrown after a short and role-specific in-game training, and a briefing/tactical discussion, into a realistic contemporary multiplayer battleground. All other mechanics are similar to current popular realistic/semi-realistic shooters, like Battlefield, PUBG, ARMA, and the like.
Should you get killed, the game is over for good. Upon death, you get an anti-war message like "War doesn't decide who is right, but who is left", then the game force quits without prompt. The new game option will be rendered unavailable. You have to repurchase the licence for a replay. (Or if that is legally troubling, then purchase the one-cent worth in-game currency, or whatever).
A hall of fame shall be available for the longest survivors.
The core message is the title. The game is dirt cheap, but so is the player's life. Players cannot get any closer to the "thrill" of actual permadeath than this, without actually getting hurt in real life. Also the message is that war is hell. I think the concept taps in well to the current Zeitgeist (unfortunately).