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The Assassin of Chaos (yes, I'm really that selfcentered, it's a frikking title)

>6 factions (Cult, Assassins, Army, Rebels, Vigilante, the People)
> Customization options (Face, hair, colour of hair and eyes, colour of clothes, distinguishing features)
>Parkor and free-running boosted be hand and foot devices designed to boot running, jumping, landing and destructive capabilities in CQC. Landings can cause explosions, punches causes strong knockback in weak opponents with light health to offset power.
>Enviroments being destroyed can be parkoured - Usefulness means enviroment should be reproducible, intergrate system to aid with this (slow mo, light up parkourable elements)

> Setting - Near post-apocalyptic, city-based Great Britain with mainly perma-camps in most of the countryside and a few country spots in locations that are beautiful, mainly near water if possible. Suburban areas should be slightly empty with Rebels doing their business, more city areas should be occupied by raiding Rebels or Army occupying said regions, country side free game to all with Cult, Self and the People mainly duking it out. Assassins and Vigilante cover all areas as necessary.
>Main storyline: The AoC wakes up to a new battle, except this time his/her house is destroyed forcing them to fight their way out as neither side considers them friendly. Moves into one of 6 factions after completing a mission for each one, completing prologue missions for each side campaign before making a choice as to who does what. Essentially, either building up your own power or, as Rebel or Army, building up your Faction's power, to defeat the other factions by acquiring new technology, power or similar. Eventually, after taking on each faction in a series of Faction(s) vs. Faction(s) battle and other combat, clash in battle royale of all factions. Your Faction is victorious, but as you celebrate a new threat in the form of another faction arises, with varying reactions depending on Faction and Trust. (faction countered in MP?)
> Cities fought for between Rebels and Army mainly, Cult tending to their own biz, Assassins performing their jobs without being found, the People living their lives, self being with the Warrior of Order (oppo design to AoC). If Self, fighting for yourself and GF.
> Each faction has AoC doing different things:
Army; Fighting alongside GF (girlfriend) in order to achieve country's submission by force to ensure aid in overseas ventures.
Rebels; Aiming to achieve dominance over England to cease overseas activities by fighting the Army back.
Assassins; Eliminating the major controlling leaders to force the war to end.
Cult; Attempting to summon up a Demon God in order to dominate the Earth.
The People; Keeping the country's population safe by working with them rather than for or against them.
Vigilante; Fighting against the other Factions (besides The People) alongside another character, the Warrior of Order, or WoO, to ensure that all factions cease their fighting.
>Each faction represents different playstyle and/or genre:
Army; Traditional war combat.
Rebels; Strategic, hit-and-run combat.
Assassins; Infiltration, target killing combat.
Cult; Item retrieval, skill levelling (grinding) combat.
The People; 1 vs Many combat, either Predatory or Assault style attack depending on player, like Batman.
Vigilante; 1 vs Several, 2 vs Many Infiltration missions (overwatch or infiltrating)
> Secret 7th Faction if all 6 are complete:
Self; Your choice - Stealthy, predatory, assault or hybrid? Attempting to dominate the other factions in power in order to achieve total peace in the country so they can solve the problems by diplomacy.

>Factions have different trust levels. Each Prologue Campaign for each Faction will allow you to gain the necessary Trust for joining, although only one Faction may be joined at a time. Higher trust means access to more facilities, equipment and Skills.
> MP unlocked post-game completion. Features you as a faction member fully customisable, with customisations affecting AoC's appearance in SP.
> SP may require sidequests and randomly generated content (RGC) like quests and events in order to counter post-game completion boredom. Possibly continuous game quest involving 'keeping the peace' or related Faction things.
>Upgrades occur in 9 Skill Trees: Survival, Tech, Training, Revolution, Infiltration, Occult, Community, Heroic, Chaotic. Each one can have skills with multiple upgrades and each focuses on different aspects:
Survival focuses on natural abilities of AoC, like increasing parkour and freerunning capabilities or stamina and health.
Tech focuses on battle armor, reducing damage and increasing armor-based skills.
Training focuses on increasing firearm capability, increasing accuracy, ranged damage, takedowns and similar.
Revolution focuses on hit-and-run tactics, decreasing some capabilities in return for greating improving one or improving several others as well as adding powerful skills with high cooldown timers. Several skills to assist self and in skills as well.
Infiltration focuses on increasing stealth capabilities, converting amor into optical camo, quieter movement and quicker takedowns. Melee and SR use can become more effective.
Occult focuses on the more active side, bringing out powerful skills that can deal damage lower than Revolution's but with a much quicker cooldown. Summons and the elements can be utilized. Few passive skills to mitigate for skills and similar.
Community focuses on attack in groups, dealing less friendly fire damage and summoning up teammates to help you, as well as group-necessary tricks and similar.
Heroic focuses on all aspects - bringing out the best in AoC's capabilities, becoming more destructive in terms of raw damage output and of the enviroment.
Chaotic does as well, but more covertly - brings up raw and total damage but keeping enviromental damage down. Slightly improves across all other Skill Trees by including similar but weaker skills from them all.

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EDIT: Reordered them according to some logic in me.