Megaton Rainfall (PC)

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Easy "Explorer" Achievement

Fly Very far from Earth - You'll be doing flying for about ten to twenty minutes until you get the achievement. You'll know its working if you keep flying for approximately 5 minutes, and by then you get some hints about returning. Eventually it will say that you will not get a trophy for it (but you do). Once you get the achievement, you should fly back. We tested going further for about thirty minutes, then spent the next two hours trying to find a black hole so we could respawn. Head back as soon as you get the achievement for your own time sake.

Easy "Suicide" Achievement

Black Hole - To complete this achievement you must kill your character, an immortal being. The only way to do so is to fly into a black hole. You are likely to find a black hole while going through space and finding the signs.

Secret Health bar

Blowing up Cities: Blowing up too many cities will give you a few hints, until you are threatened of having the health bar reduced to a pixel. The threats are not empty... To do this, blow up about 10 or more buildings.

Health: You're health will be greatly reduced to approximatly 5%, but after either quitting the game, or coming back later (exact time unknown) the health bar will go back up to 5. Destroying more cities will put it back down once more.

Various Steam Achievements

Complete the indicated task to unlock the achievement.

AchievementHow to unlock
All TrophiesGet every trophy.
All-powerfulAcquire every superpower.
ApocalypticDestroy Earth.
CollectorCollect every Xenosphere.
End game - HardBeat the game in hard mode.
End game - SpeedrunBeat the game in less than two hours.
End gameBeat the game.
ExplorerGet really far from Earth.
HeroGet rank A in one mission.
RescuerFinish one mission with no casualties.
SaviorFinish 3 missions with no casualties.
SuicideKill yourself.
Super superheroGet rank A in all the missions.
ThreeDestroy 3 enemies with a single Gigaton Blast.

Xeno Cubes Guide

A guide to find the Xeno Cubes.

How to Use Signs
You can do this before or after you do the final mission. If you do it after the final mission, you'll have to do the final mission again to get the final xeno cube.

Requirements
Ability to travel to other planets
Heat Ray

Finding the signs
One of the most efficient strategies for finding a sign is to fly outside of the galaxy. Once you do so, you'll notice a blinking light with an arrow pointing to it. This is Earth. There will be another blinking light with a higher pitch sound than the one on earth. Follow this and it will take you to a sign.

Using a sign
Using signs are pretty easy. Once you find the obelisk, there will be a beam of light coming from it, you'll want to stand in front of this light. This will pull you into a prerecorded message which will loop until you move away from it. Once you want to find the next sign, use the Heat Ray to destroy the obelisk. From here you back out of the solar system and repeat this process.

Achievements:
Suicide Achievement will be easy to aquire on the third sign and seventh sign.

First Sign
Located in the milky way. if you leave earth's solar system it should be easy. if you leave the galaxy it'll be easier.

Second Sign
This is located on an arid desert, very close to a star.

Third Sign
Trinary System (3 stars) with a black hole in the center.

Suicide Achievement:
The suicide achievement is best to acquire while you are here (and may save you hours of searching). Below is the requirement to do the achievement. Fly into a black hole. thats it.

Fourth Sign
The Fourth sign is located on an astroid, which is amongst an astroid belt surrounding a black/purple planet.

Fifth Sign
Fifth sign is located on a gas giant, more specifically an astroid floating in the planet. Planet is covered in black tornadoes as well.

Sixth Sign
Binary System (2 stars). Located on a moon of a gas giant.

Seventh Sign
Located on a very hot planet, close to a star. The system also has a black hole.

Final
To get the last xeno cube, you must complete the final mission after getting the first seven signs. You can do this after completing the final mission for the first time or before.