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Quad 
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2D top down.
Turn based.
Squad based (four characters max in a party).
Cannot move or fire diagonally.
Friendlies can fire through each other.
Limited saves via rare item and safe rooms.
Permanent death.
Items must be equipped or dropped/destroyed (i.e. no “backpack”).
Procedurally generated items/monsters/maps.
Destructible terrain.
Party combos during combat.
Experience for destroying terrain, killing monsters, looting, using items, completing missions, successfully navigating dungeons.

All characters can destroy walls except the Scout.
All characters can drop explosives except the Leader.
All characters can shoot through friendlies except the Grenadier.
All characters can swap places except the Support.

Leader – rifle is accurate with medium damage and low AP cost
	- melee attack is average
–	combos with scout
–	leader knockback makes next friendly shot a crit
–	can upgrade to burst fire
–	can spend 1 AP to reduce fire AP cost for the rest of the turn.
Scout – sniper rifle is very accurate with high damage and penetration and high AP cost
	- melee attack is low
–	combos with leader
–	can shoot through barriers and up to two monsters at once
–	can upgrade to expansion shot (no penetration, higher single target damage)
–	can retreat from melee range without giving monsters a free attack.
Grenadier – grenade launcher is accurate with very high damage and very high AP cost.
	- melee damage is high
–	combos with support
–	does aoe damage and can knock enemies back
–	can upgrade to claymore (aoe in only a 180 arc in direction fired)
–	can fire concussion grenades that confuse the enemy.
Support – automatic rifle is not accurate with high damage and medium AP cost.
	- melee damage is very high
–	combos with grenadier
–	can suppress enemies, making them temporarily scatter/retreat
–	can upgrade to supplant, swapping places with an enemy unit
–	can knock monsters back in melee

Field Promotions and Ranks:
–	Ranks confer a bonus to tech unlocks in security lockers.
–	Higher ranks make monsters less likely to attack them over lower ranks.
–	Characters can be demoted via friendly fire.
–	Higher ranks increase experience gains for the entire squad.
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Squad Formations
All formations require a full squad (four members) and confer a bonus to each member.
All formations require members to be adjacent (non-diagonally) with at least one other member.

L-formation – Three member line with the last member in front or behind on one end.  Protects flanks and the non-line member takes 50% less damage.

T-formation – Three member line with last member in the middle. Focused Fire grants each member 25% more damage dealt.

S-formation – Double and parallel two man lines with one pair adjacent. Increases firing range of all members by 1.

I-formation – Four member firing line. Each member has fire control AP cost reduced 50%.

Q-formation – Four members in a square. Last stand formation grants AP free swap actions.