After a few hours of brainstorming, I’ve got an idea that is simple enough. So…

• There are three trenches – two are occupied by enemies, one by lone soldier, who’s out of ammo (that’ll be player)
• When player is hidden in a trench, enemies don’t shoot. Player can move in the trench and stick his head out of it (enemies shoot then)
• Goal: to survive and make the enemies kill each other

I have to go now, so after 9,5 hours of challenge, I’ve done:

• 2 hours of brainstorming
• 0 hours of asset creation
• 0 hours of coding.