Achievments solved
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After reading this there was suggestion loading a level and waiting unlocks the achievments, I loaded level 25 and sat ingame for 1.5 hours (roughly) and the missing 3k cheeves slowly unlocked. Suggest people try that before wasting time doing the other steps I tried...
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Level 10 missing[i.imgur.com]

So I've beat the game from start to finish several times, in one sitting and can't get any achievements to unlock passed 1300.


Level 10 doesn't unlock on my level select either.

I've tried;
Uninstalled the game
Deleting the game folder from the steam folders
Deleting the game folder from AppData
Deleting the registry keys associated with the game
Reinstalling
And beating 1-25 with a fresh install

And I've just tried beating the game 1-25 on a different machine (my laptop)
Nothing.

My laptop also has the issue of level 10 not being unlocked.

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Bug I've noticed, if you die on level 15 you can't restart, game softlocks