This trophy will unlock when you finish level 25 ‘The centre cannot hold’ on normal mode. Dark Matter Mode will be available after that.

This trophy will unlock when you finish level 25 ‘The centre cannot hold’ on Dark Matter mode.

Seems to work in normal mode only. Only advice: defend, defend, defend! Until you have a stable population of seeds: never let your seed count drop too low, equip every asteroid with one or two defense trees, get advanced seedlings as soon as you can. This may require several level restarts, a flower early on is very helpful. Don’t let your guard down, one time I lost a tree seconds before the game ended.

The developers have confirmed that this trophy is glitched. "The bug causes the destroyed tree count not to be reset to zero unless you win a level."
Workaround: "Actually you just need to win another level immediately before playing l24." (Thanks to xelnia for pointing this out)

You only have to defeat all grey enemies. They're on the two large asteroids and on two tiny ones which you can only reach via the large ones. After about 30-40 minutes you should have conquered enough asteroids around the upper large one and have got enough seeds, depending on level settings and your recklessness. The final attack takes only a few minutes. Build up an army, swarm the first large asteroid, take the adjacent small one, stock up your army again on your first large asteroid, you should reach the second from there. Don't forget the second small planet and ignore the rest.

See roadmap - Step 3: Pseudo Speed Run

Obviously, this only unlocks in normal mode. You have two objectives: defend Greys for ten minutes and don’t destroy any trees. Easiest method: don't do anything, just sit and wait. If this doesn't work at first, just restart again and again until it does. Sooner or later you will get a setting where the Grey survive by themselves. (Thanks to archchimaira for this)

I got it the hard way which doesn't work every time as well, where I used a combination of two strategies: Flee: Don’t build any defence trees near greys, settle on every possible empty asteroid. Flee if attacked by Greys (to keep their number up), either flee or defend if attacked by any other tribe. Hope for the best. Support: Settle on every possible empty asteroid. There are Greys directly to the right. At one time they will move out completely and leave their asteroid unattended. Send in a few of your seeds, build a Dyson tree and retreat. The Grey will return and take it back. But now they have a Dyson tree that they wouldn’t have built themselves. Defend your position, their Dyson tree should compensate any losses of their attack.

Should come naturally while playing. Otherwise send smaller chunks of weak seeds to a well defended enemy asteroid so you don’t risk to wipe them out accidentally. One good place is level 19 ‘Looking Glass’ after conquering the large asteroid to the left.

Should come naturally while playing, probably even before finishing normal mode. Just send scouts to all unknown asteroids around. They may find a swarm of your seeds buzzing around an asteroid with or without a tree (e.g. in level 18 ‘Hide and Seek’). There are a total of 630 seeds hidden in different levels:
lvl 01: 9
lvl 06: 57
lvl 09: 160
lvl 12: 60
lvl 14: 100
lvl 17: 49
lvl 18: 72
lvl 20: 123
Although the number at the beginning of a level is always the same, there is some variation, e.g. an asteroid may get attacked before you can discover it or a Dyson tree adds more seeds. See the forum strategy guide for more infos for each level.

Should come naturally while playing. Similar to Martyrdom, this time the number of killed enemy seeds counts.

Send a flower or a mine to an unknown asteroid instead of a regular scout

I don’t know how far “50000 arbitrary distance units” are, but sending a flower or a mine form one end to the other in a large level does the trick.

This trophy unlocks as soon as 10 flowers orbit around one asteroid. After that you can send them somewhere else and use them regularly. The difficult part is to find a level where you can afford having 10 flowers and not needing them immediately. Any large level like 14 ‘Liberation’ should work as soon as you outnumber your enemy and still continue building Dyson trees.

Similar to Gardener, only with 5 mines.

See Stalemate

The opposite of Attrition. I don’t know where to get it, it unlocked for me naturally while playing normal mode. If it won’t unlock for you wait for being attacked and try prolonging the fight with small reinforcements.

To unlock this trophy you have to create a ongoing stream of seedlings, direct it to a well populated enemy asteroid where it continuously diminishes enemies, without killing too many of them. Good place for this is level 19 ‘Looking Glass’: conquer every asteroid on the left, build as many normal Dyson trees as possible, keep the use of flowers on Dyson trees to a minimum. When everything is ready, set beacons for 2-3 asteroids on that large enemy asteroid. Monitor the enemy population, it should be stable yet you should see if some were killed and respawned. Set more beacons but don’t overdo it. Now wait. Stalemate will unlock sooner or later, as well as Martyrdom, Aggressor and Attrition.

If you use mines a lot, this should come naturally while playing. If a mine is destroyed, it goes down with an explosion, the larger the yellow energy bar, the bigger the explosion. Just send an average mine (or better) to a densely populated enemy asteroid.

Press right on the D-Pad and direct fresh seeds to an enemy asteroid. That’s it.

There is no difference between normal and dark matter mode, so if you missed an artifact on the first playthrough you can get it later in dark matter mode. There are 30 artifacts in all. To find an artifact, slightly zoom in on a scouted asteroid, if there’s a odd coloured dot orbiting around it, you have found one. After you planted any tree, fully zoom in on it to unlock it. Having lots of seeds on that asteroid makes it difficult to discover an artifact, so check whenever you sent a scout or planted a tree. My condolences to all who play this on an old tube TV, I hope you have good eyes...
If for some reason you forgot to collect an artifact and now it is on the only asteroid which you haven’t colonized, there is still a way to get it. Send in your seeds as usual. While they are destroying a tree and breaking into the core, fully zoom in onto the artifact and keep it on the screen. As soon as the seeds take over the asteroid, the artifact will unlock, you see the description, you can acknowledge it and the level ends right after that.

Levels can contain 0 to 2 artifacts, here’s a list of all 30 artifacts:

• Level 04: Ovoid 7
• Level 05: Cubos, Q-Plane
• Level 06: Bolian Radio
• Level 07: Celestia Nest
• Level 08: Amberous, Gersical Void
• Level 09: Antropian Trap
• Level 10: Micro Nautilus, Gliesian Mirror
• Level 11: Geres Cloud Horn, Grower Husk
• Level 12: Cache 13
• Level 13: Cache 14
• Level 14: Auto Vac, Iron Baloon
• Level 15: Flux Calendar
• Level 16: Fear Flower
• Level 17: The Twins
• Level 18: Guardian
• Level 19: The Versuvia Tablet, False Witness
• Level 20: Companions
• Level 21: The individual
• Level 22: Zotropic Enhancer, Gravitonastus
• Level 23: Sensoric Antenna, Protoflora
• Level 24: Mimic
• Level 25: ?

You can unlock this trophy on one large asteroid in level 11 ‘The Vicious Ones’ or two in Dark Matter level 7 ‘Containment’ where 2 of 3 attributes are already at maximum. Press Up on the D-Pad, select the attribute which you want increase and press right until maxed out. Press X to select OK and seedlings start to get absorbed. As soon as the attribute bar is full, the trophy unlocks.