Space Combat - Mass Effect: Legendary Edition Guide - IGN (2024)

This section of our Mass Effect Legendary Edition guide details the Codex Entries for Space Combat. This information is taken straight from the games, allowing you to read this information whenever you want. For more information, visit our Complete Codex page.

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Overview

Ship mobility dominates space combat; the primary objective is to align the mass accelerator along the bow with the opposing vessel's broadside. Battles typically play out as artillery duels fought at ranges measured in thousands of kilometers, though assault through defended mass relays often occur at "knife fight" ranges as close as a few dozen kilometers.

Most ship-to-ship engagements are skirmishes between patrol vessels of cruiser weight and below, with dreadnoughts and carriers only deployed in full-scale fleet actions. Battles in open space are short and often inconclusive, as the weaker opponent generally disengages.

Once a ship enters FTL flight the combat is effectively over; there are no sensors capable of tracking them, or weapons capable of damaging them. The only way to guarantee an enemy will stand and fight is to attack a location they have a vested interest in, such as a settled world or a strategically-important mass relay.

General Tactics

Shells lofted by surface navies crash back to earth when their acceleration is overwhelmed by gravity and air resistance. In space, a projectile has unlimited range, it will keep moving until it hits something.

Practical gunnery range is determined by the velocity of the attacker's ordinance and the maneuverability of the target. Beyond a certain range, a small ship's ability to dodge trumps a larger attacker's projectile speed. The largest-ranged combat occurs between dreadnoughts, whose projectiles have the highest velocity but are the least maneuverable. The shortest-range combat is between frigates, which have the slowest projectile velocities and highest maneuverability.

Opposing dreadnoughts open with main gun artillery duel at EXTREME ranges of tens of thousands of kilometers. The fleet close, maintaining evasive lateral motion while keeping their bow guns facing the enemy. Fighters are launched and attempt to close to disruptor torpedo range. Cautious admirals weaken the enemy with ranged fire and fighter strikes before committing to close action. Aggressive commanders advance so cruisers and frigates can engage.

At LONG range, the main guns of cruisers become useful. Friendly interceptors engage enemy fighters until the attackers enter the range of ship-based GARDIAN fire. Dreadnoughts fire from the rear, screened by smaller ships. Commanders must decide whether to commit to a general melee or retreat into FTL.

At MEDIUM range, ships can use broadside guns. Fleets intermingle, and it becomes difficult to retreat in order. Ships with damaged kinetic barriers are vulnerable to wolfpack1 frigate flotillas that speed through the battle space.

Only fighters and frigates enter CLOSE "knife fight" ranges of 10 or fewer kilometers. Fighters loose their disruptor torpedoes, bringing down a ship's kinetic barriers and allowing it to be swarmed by frigates. GARDIAN lasers become viable weapons, swatting down fighters and boiling away warship armor.

Neither dreadnoughts nor cruisers can use their main guns at close range; laying the bow on a moving target becomes impossible. Superheated thruster exhaust becomes a hazard.

Planetary Assaults

Planetary assaults are complicated if the target is a habitable garden world; the attackers cannot approach the defenders straight on.

The Citadel Conventions prohibit the use of large kinetic impactors against habitable worlds. In a straight-on attack, any misses plough into the planet behind the defending fleet. If the defenders position themselves between the attackers and the planet, they can fire at will while the attacker risks hitting the planet.

Successful assaults on garden worlds hinge upon up-to-date intelligence. Attackers need to determine where the enemy's defenses are, so they may approach from an angle that allows them to fire with no collateral damage. Note this is not necessary for hostile worlds.

Once control of orbit has been lost, defensive garrisons disperse into the wilderness. An enemy with orbital superiority can bombard surface forces with impunity. The best option for defenders is to hide and collect reconnaissance in anticipation of relief forces.

Given the size of a planet, it is impractical to garrison entire conquered worlds. Fortunately, colonization efforts tend to focus on building up a dozen or fewer areas. Ground forces occupy the spaceports, industrial facilities, and major population centers. The wilderness is patrolled by unmanned aerial vehicles and satellite reconnaissance. If a defender unit is spotted, airmobile rapid deployment units and satellite artillery are used to pin down and destroy them.

Trans-Relay Assaults

The crucial choice for any attack through mass relays is how to divide the fleet for transit. The accuracy of a relay's mass-projection depends on the mass being moved and how far it’s going. Any long distance and/or high mass jump will see "drift". That is, a ship may be hundreds or millions of kilometers from its intended drop point, in any direction from the relay.

Distance can't be chosen by admirals, but a relay is told how much mass to transit. For example, if told to move a million metric tons of mass, the relay will scan the approach corridor, find four 250,000-ton freighters, and transit them together, maintaining their relative positions.

A commander has the option of moving his fleet as one large, coherent formation that may be wildly off-position, or breaking it up into many smaller formations that will be individually closer to the intended attack point, but could be widely dispersed.

Conservative assault doctrine holds that fleets should be moved en masse, maintaining concentration of force and reducing the chances of collision. The only time it is reasonable to split up a formation is during blockade running.

Combat Endurance

Heat limits the length and intensity of ship-to-ship combat. Starships generate enormous heat when they fire high-energy weapons, perform maneuvering burns, and run on-board combat electronics.

In combat, warships produce heat more quickly than they can disperse it. As heat builds within a vessel, the crewed spaces become increasingly uncomfortable. Before the heat reaches lethal levels, a ship must win or retreat by entering FTL. After an FTL run, the ships halts, shuts down non-essential systems, and activates the heat radiation gear.

Combat endurance varies by ship design and by the battle's location. Battles in the deep cold of interstellar space can go on for some time. Engagements close to a star are brief. Since habitable worlds are usually close to a star, battles over them are usually more frantic.

Pursuit Tactics

Dependent on light, sensors cannot detect objects moving at a faster-than-light speeds. No ship can be detected at interstellar ranges. Detection at interplanetary ranges suffers from light speed lag: observers see ships not where they appear to be but where they were when the light bearing their image left them, minutes, hours, or days before. To counteract light speed lag, battle fleets surround themselves with spheres of screen and scouting frigates.

Pursuers cannot detect ships and directly intercept them. Instead, pursuers track where objects were, where they were heading, and at what speed they were moving. Such data reliably predicts an object's future location and for pursuit along its light-lagged "wake". Ships trying to evade pursuit follow erratic zigzag courses, requiring pursuers to make stops to update their projections.