I can tell you the difference between the other, biggest, best FPS of all time, Goldeneye.
Halo-
Different weapons, in which each are useful.
You can only carry two weapons at a time.
Grenades are assigned to a button and can be freely used.
Vehicles are emphasized, and show up frequently in single and multiplayer.
Stealh is a necessity.
It has a cohesive story, comprehendible without reading the books.
Free dual-wield.
Better melee combat.
Jumping.
Goldeneye-
Broader number of weapons, but many many useless ones (throwing knives? Phantom? PP7?)
You can have 30 weapons at a time. Hell, All Weapons mode.
Grenades need to be assigned like any other weapon, and can't be used tactically.
The only vehicle is a tank, which shows up twice in the single player, and is unusable in multiplayer.
Single player is more offensive, no real stealth is used.
The story was nearly non-existant. You have to watch the movie. Not that it's HORRIBLE to need to watch the movie, but it's nice.
Dual wielding can only be done if you find an enemy that has two weapons. Except for that glitch.
Melee combat is non-existent. Seriously, in close quarters, all anyone does is get distance so they can shoot. They don't unequip weapons and beat somebody down.
No jumping.
I mean, we're not talking about PC FPSs here, 80% of which are just Unreal knockoffs.
But cmon, RPGs are all the same? The battle systems are all drastically different. Not to mention things like equipment and skills.
Halo-
Different weapons, in which each are useful.
You can only carry two weapons at a time.
Grenades are assigned to a button and can be freely used.
Vehicles are emphasized, and show up frequently in single and multiplayer.
Stealh is a necessity.
It has a cohesive story, comprehendible without reading the books.
Free dual-wield.
Better melee combat.
Jumping.
Goldeneye-
Broader number of weapons, but many many useless ones (throwing knives? Phantom? PP7?)
You can have 30 weapons at a time. Hell, All Weapons mode.
Grenades need to be assigned like any other weapon, and can't be used tactically.
The only vehicle is a tank, which shows up twice in the single player, and is unusable in multiplayer.
Single player is more offensive, no real stealth is used.
The story was nearly non-existant. You have to watch the movie. Not that it's HORRIBLE to need to watch the movie, but it's nice.
Dual wielding can only be done if you find an enemy that has two weapons. Except for that glitch.
Melee combat is non-existent. Seriously, in close quarters, all anyone does is get distance so they can shoot. They don't unequip weapons and beat somebody down.
No jumping.
I mean, we're not talking about PC FPSs here, 80% of which are just Unreal knockoffs.
But cmon, RPGs are all the same? The battle systems are all drastically different. Not to mention things like equipment and skills.