Shoot 'em up!!!
The following gunfighters are locked inside a huge shopping mall and are forced to fight each other until there is one person/team left. Who survives? They have unlimited ammo. The shopping mall is well lit, but there are many dark corners and places for cover.
El Maricahi, armed with his dual pistols.
Mr. Smith (Last man standing), armed with his twin .45's.
Smith (Shoot 'em up), armed with a 9mm Beretta.
Mr. and Mrs. Smith (Mr. and Mrs. Smith), as a team. He is armed with a 9mm Glock, she with a silenced MP5 assault rifle.
John McClane, armed with a pistol and an MP5 assault rifle. McClane has body armor.
Bob Lee Swagger, armed with a 9mm Beratta and an M4 assault rifle. Swagger has body armor.
Martin Riggs and Roger Murtaugh. Riggs has his Beretta, Murtaugh has his wheel gun, and they both have MP5 assault rifles. They both have body armor.
El Wray (Planet Terror), armed with twin revolvers.
Vincent (Collateral), armed with his pistol.
Snake Plissken, armed with his twin revolvers.
I gave some of them body armor and some more weapons, because obviously some are more skilled than the others. Feel free to alter weaponry, or to add more combatants.