If you give Chief every possible weapon and grenade (like it sounds like you are giving Delta) He would have (as lord revan said) two frags, two plasmas, two firebombs, and two spike grenades. He would have a spartan laser, and an energy sword (loaned from arbiter lol). Also, he would have an equipment, lets say a bubble shield.
The last of the UNSC SPARTAN IIs, known as Master Chief, or John, SPARTAN 117, comes in using active camo. Delta Squad, the elite of the Republic Commandos, one of only 12 squads left intact after Geonosis, spot him with infrared. Sev snipes Chief and it destroys his camouflage, and drains his shields. Chief hides, waiting for his shields to recharge behind a rock. Delta notices the power armor, and throws out an ECD. Chief now has no overshields, but still retains the added strength and speed of his suit, as it is powered by a small nuclear reactor (true). Chief, remembering where he was sniped from, lasers Sev , completely draining all shields and penetrating his armor. Scorch tosses a flash bang, but chiefs visor polarizes and his vacuum sealed suit filters out the harmful audio. Chief runs at blinding speeds (faster than any clone) to the next rock. Before Boss calls "run" Chief tosses a fragmentation grenade. It has little effect on the Katarn II armor, but the smoke and explosion are disorienting. Before Delta's shields recharge, Chief tosses in an incendiary grenade, draining the rest of Delta's shields and causing massive fire damage. Delta shakes it off, reforms tactically, and starts firing at Chief's position. Although behind cover, he is bulky and takes some minimal fire. Chief tries to stick one of the members with a spike grenade, but it goes in the middle. The explosion hails out red hot metal spikes. Delta is injured, but Fixer recieved the brunt of the explosion, made evident by the four six-inch long still glowing spikes protruding from his gut. He is incapacitated. While Boss tries to revive him, Scorch gives covering fire. Chief sees an opportunity, and charges up his laser. Scorch remembers how it killed Sev, hears the sound and sees the tell-tale beam, and charges Chief with all hes got. He runs, firing Deece at full auto. Chief, taking fire, stops charging the laser and throws out a bubble shield. Scorch's rounds dissipate or ricochet upon impacting the shield. He is close to the shield, and starts to run away, but not before Chief emerges from the shield. Chief, having switched weapons in the shield, lunges at Scorch with the energy sword. Scorch falls down, dead, but Chief does not stop. Boss has been firing, but intermittently because he was behind cover. He now throws a sonic detonator at chief, but barely misses. Chief rolls out of the way, but is shaken by the explosion. Chief then sprints for Boss, who is now only ten feet away. Boss pulls out his vibroblade, slicing Chief in the gut, but the Spartan is not fazed. Master Chief connects a solid metal fist at several thousand pounds per square inch of pressure with Boss's helmet. It does not break, but the sheer force of impact hemorrhages his brain, causing instant death. Fixer, barely alive, groans and raises his DC-15s pistol to the height of Master Chief's head. Chief, hearing him, whirls around, but not fast enough to avoid it altogether. The round hits him full on in the chest, followed by more. Reeling from the blows, and bleeding inside, Chief falls to his knees. Fixer, completely exhausted, lets his arm go limp, because he simply has no strength left. The last thing he sees is a bright blue glow enveloping his visor, as if it were attached. Then, oblivion surrounded him.
A Pelican then comes to extract Chief, and a LAAT gunship is called off on account of critical mission failure. But the policy of the Marines, "leave no man behind" is followed to the letter. Sgt.Johnson lands and picks up a critically injured, yet still breathing Master Chief.
Sorry for Delta fans, even though I am one, Chief wins. Barely. If anyone is to post on this subject accurately, it would be me. I have beaten all three Halo games, read all 5 Halo books, and beaten Republic Commando, and read all three Republic Commando books. It was tough for me to kill off Delta. Maybe, another time, they will have a rematch.
-Merciless Mandalore, a.k.a. krakenkiller.