Marathon: Complete 20 levels


Pretty self-explanatory. Complete 20 different levels across the whole game.



Pathfinder: Complete a biome


I found that the Aether biome was the easiest, though a couple levels were not quite stable (like the rest of the game). Cave biome is also not too hard.



Traveller: Complete half of levels in every biome


Every biome has 11-12 levels, and completing 5 or 6 levels in each one won't take long.



Plexus: Complete the game


Luckily you don't have to beat every level to achieve this, you just need to beat the 4 bosses. Good luck.




For reference, here is each biome and its corresponding symbol.

First Blood: Kill a monster



Hundred: Kill 100 enemies



Thousand: Kill 1000 enemies



Over 9000: Kill 9000 enemies



Raider: Kill a boss



Self-explanatory. If it shoots at you, it's an enemy. A boss is the big burly guy in the levels marked with a skull. Golem (in the Cave biome) is the easiest of the four.

Event Horizon: Make a Monster pulled into the black hole


There are black holes throughout the Chaos biome. You'll first encounter them in the Infinity level (directly branches off of Chaos is All). They do massive damage and cause instant-death if you get sucked in. Shoot at or ram an enemy ship and force them to get sucked in instead.

Alternatively, you can simply use the Black Hole relic.



Dominator: Kill 6 monsters in a second


I actually did this in one of the challenge levels, located in the main menu. Go into "Like a Boss" and choose the Factory biome, then just play that boss like normal and shoot up the level until enough enemies die.



Kamikaze: Kill 2 monsters with your corpse


This one is more luck based. Notice how when you die, your ship flies off in a random direction and then explodes. You need to do that but have the explosion hit and kill two enemies. The explosion itself will do enough damage, it's just about getting lucky with where the game aims your corpse.



Power Overwhelming: Charge Athena with a lot of mana


(I'll be honest, I haven't encountered this yet. I'm still working on it, but if anyone has any info I'd appreciate it!)



RAM!!!: Kill a monster with a ram


Much like how you take damage when you ram into objects, enemies do as well, and you both take damage when you ram into each other. Equip your Obsidian Armor, fire off a couple shots to wear down their health, and then hit the gas.

Requiem: Die 10 times trying to complete level



King of Corpses: Die 100 times



Again, self-explanatory. I guarantee you will get these as you play through the game (when it doesn't crash). I got Requiem on the Subsurfers level in the Cave biome.



Lucky: Survive with 1 HP


This achievement isn't as hard as it sounds. You just need to drop to 1 HP, you don't need to finish the level there (though you do need to finish the level). The Light Armor gives you the least amount of HP (800), so put that on and load up one of the tutorial levels, since they have the least amount of resistance. The portal at the end is right next to a wall, and coincidentally whenever you hit a wall you take damage. Start ramming your ship against the wall over and over until you get to 1 HP, then hit the portal.

Lock, Stock and Many Smoking Barrels: Find all weapons



Full House: Find all relics



Random weapons and relics (and all types of upgrades) drop from enemy deaths. One of many problems with this game is that what you get is not based on what you don't yet have. So you could have the Needle Gun and then get that bonus the next seven times. Luckily, those shiny blue crystals are there. Collect 10, go to your inventory, and build something. You will get a random bonus but it is guaranteed to be something you don't have (and hopefully a weapon or relic).

Note that there are four relics you only get by beating the four bosses.



Loser: Destroy 2 bonuses on a level


This refers to those upgrades. When they drop, shoot them until they are destroyed. Ship repairs (the two crossed wrenches) do not count towards this achievement, anything else does.