Because, while having extra achievements for Sp'Knights is a good thing, an even better thing is having extra achievements for both Sp'Knights... and other games.

Submitting Achievements (whether you pulled them off or not) is mostly done for fun. If you actually try any of these, and take a video of it, we'd love to see them! And stop by the other thread, linked at the top of the page, if you want to see (or submit) any achievements for Spiral Knights.

SUBMISSION FORM
~[ACHIEVEMENT NAME]~
[GAME NAME]
[REQUIREMENTS]

...Really, that's it. Note that some achievements may call for more than one game (for example, the Pokemon series allowing for 'mons from 3rd Gen to be transferred all the way through to 6th), while others may be possible in more than one game, with varying difficulty. Some may also require modifications to the game. It really depends on the writer. This is rather open-ended, so go nuts! Just remember: Spiral Knights achievements go here.

I'll make a few achievements to start you off.

~TO TRAIN THEM TAKES TOO LONG~
Pokemon Series
Defeat a Frontier Brain, Tower Tycoon, Subway Boss, Battle Chatelaine, or a similar opponent using only Pokemon that have no Effort Values in any stat.

~GOOD OLD FISTICUFFS~
Dungeons & Dragons Online
Complete Tharashk Arena without any Monks, using only your bare fists after entering the arena through Ready Room One.

~I'M A PACIFIST...~
Fire Emblem series
Clear 3 or more chapters in a single run without killing any enemies that aren't the boss of the chapter, and successfully finish with no character deaths. (Chapter 10 in Path of Radiance counts for this achievement, since that chapter is extremely tedious... and has enemies that aren't the boss that don't trigger the alarm.)

~ERECTIN' A DISPENSER~
Minecraft (No gameplay mods permitted)
Kill 50 enemies in a single night, without using the attack/destroy block button or having a weapon equipped on the hotbar. Do not use any gameplay-affecting mods.

~WINDS OF DENSITY, CHANGE~
Minecraft (Archimedes' Ships mod, and some mod that provides Lead, required)
Create an Archimedes Airship (that flies) with at least twenty Lead Blocks.