The Ultimate Goal
Upon completion of all the other missions your homeworld has to offer you, and upon reaching a sufficiently high empire rank, you will be given the mission to make contact with the Grox, and eventually to investigate the Galactic Core which the Grox seem to be protecting.
Making contact with the Grox isn't particularly easy in itself - they are at the centre of the galaxy which will most likely be a long trek from any colony you've established, and even further from your homeworld. Having significant amounts of Energy Mega Packs, Extreme Energy Storage, and Interstellar Drive 5 will help tremendously, although they become necessities for any method you use to reach the Galactic Core.
Reaching the Grox
Before you leave, it may be worthwhile to destroy any nearby nation you are at war with or at the very least make peace with them; an enemy attack during your quest to find the Grox is very annoying and in the event that they attack your homeworld, potentially problematic. By making peace with/destroying nearby enemies, your only problems will be pirate raids, emergencies that befall your allies, and eco-disasters. Both pirate raids (either attacks on your colonies or spice stealing) and allied emergencies can be ignored, and eco-disasters can be made less likely by employing the use of Bio Protectors or Stabilisers.
Your travels will be made a lot easier by purchasing the Wormhole Key ability (ideally from an allied colony as you can knock off up to 50% from the price your own empire sells it to you, for a much more reasonable 1.5m Sporebucks as opposed to 3m). This way you can hop into the nearest wormhole and see if it takes you closer to the centre - not only does this speed up your travel to the centre but also your journey back in case you need to.
Anyway, about half the distance from the edge of centre-part of the galaxy to the core you will encounter the Grox. It's impossible to miss them if you venture far enough - your SETI will show signs of life on pretty much any star system you hover over and practically every star close to the Galactic Core is owned by the Grox. Upon entering a system they own, you will be hailed by them, and as a result you will complete your mission to make contact with them.
The Grox Empire
As hinted at before, they are by far the most expansive of any civilisation you are likely to come across during the game excluding your own, as the centre of the galaxy is densely-populated with stars, almost all of which are under exclusively Grox control. You won't find any other empires nested amongst Grox worlds, or in fact almost any life at all - all Grox planets have a TerraScore of 0 and as a result only support one Grox colony. If you choose to conquer the Grox at any point this is handy to know as although Grox ships will tear you apart very quickly (having powerful weapons and a large amount of health compared to any other civilisation you'll encounter) their colonies are very easy to destroy.
The Grox start off immediately in the lowest disposition category to you - the angry red face. Although this is the case merely contacting them will not cause the Grox to start shooting you down; however if you venture too far into their space, and get too close to the Galactic Core, they will start shooting at you anyway. The Grox are very easy to upset - any negative modifier to their disposition at all from stealing their resources to using a terraforming tool on any of their planets will immediately result in them declaring outright war on you and their disposition dropping as far off the bottom end of the scale as it can go. It is possible to ally with the Grox, but it is difficult, and is one of the hardest, most time-consuming and most negatively-impacting methods of reaching the Galactic Core and achieving galactic unity.
To The Core
Upon returning to your homeworld to report back on your contact with the Grox, your empire will decide that the Galactic Core is hiding the answers to this whole mystery and sends you on a final mission to find out what's there. The Grox, however, are in your way and have absolutely no intention of letting you through.
It may also be a good time to mention at this point that your maximum travel distance from your current star/galactic feature decreases more and more the closer you get to the Galactic Core, until it reaches a maximum of 3 parsecs (compared with the 20 or so achieveable under normal circumstances) with Interstellar Drive 5; it may be even lower for earlier versions of Interstellar Drive. As a result not only do you have to deal with relentless pounding from Grox ships but it becomes harder and harder to find a route to the Core, and the journey can become less of a mad dash and more of a maze which slowly destroys your ship. However, it is worthwhile remembering that the galaxy is three-dimensional, and stars which may appear to be outside your travel ring may actually be close enough to journey to as they are (relatively-speaking) above or below your current location. This also can open up new pathways that you couldn't find before, as with any maze you will most likely encounter dead ends.
You ultimately have three options for reaching the Core:
1) Make a mad dash for the Core. 2) Clear a path through the Grox. 3) Ally with the Grox so they let you through.
All of these methods require the same basic tools:
- Interstellar Drive 5 and Wormhole Key.
- Extreme Energy Storage and Extreme Health.
- Access to Energy Mega Pack, and ideally lots of them.
Each individual method also requires further tools and preparations, outlined in their sections below.
The Mad Dash Method
This is the easiest and quickest method for reaching the Core. You will need to fulfil the following criteria before undertaking this method:
- Have enough badges to access AOE Repair, Repair Mega Pack and Mega Auto Blaster. Mega Auto Blaster should be active, and you should have 15 AOE Repairs, 10 Repair Mega Packs for emergencies, and a lot of Energy Mega Packs (15 should do).
- Have 5 allies, all of whom willing to lend you a ship.
- A Colony Incredi-Pak.
- About 400,000 Sporebucks.
The aim here is to establish a Colony nearer to the Galactic Core than the rest of your colonies but not too close as to be infringing on Grox territory. The Sporebucks are there for you to pay for more equipment and repairs in case your trip goes sour (which it shouldn't) and you have to pull out. Then, you make your way as quickly as possible through the cluster of stars around the Core and make the jump into it once you get close enough.
Your allies are integral to this, as they form a shield of sorts - as long as you have an allied ship around you, whilst in interstellar space (which should be the only space you're in until you reach the Core - never descend into a Grox system) the Grox won't attack you and all of their ships will attack your allies instead. Your AOE Repairs are there to replenish your ally "shield" as and when their health becomes too low. Having Omnipotent status and as such a full complement of 5 allied ships isn't entirely necessary, but it helps. Both you and them can return fire on the Grox ships whilst in space, granting you a few precious seconds of peace whilst another Grox ship is dispatched from the first system you happen to stop at or go near.
With a sufficient number of AOE Repairs you will be able to find your way into the Galactic Core possibly without ever sustaining a single point of damage to your own ship, but remember to use an Energy Mega Pack to restore your energy when it goes into the red (you will be moving between a lot of star systems, so energy will drain quickly). Do not panic if you run into a dead end; your allies will protect you whilst you find another route, and remember to look for stars that are above/below your current one in case you cannot find a path. Eventually, you'll reach the Galactic Core and...well, you'll see.