Since I always die in Medium/Euclid mode, I did other intermediate challenges, in Easy/Safe mode.
So, after the "Basic Weapons" achivement, I got "Military Might", "Truly Optimized" and "Life Matters".
Since I gave you too many unsolicited suggestions... here are some OTHER suggestions!
- add a gory death animation for the Blood God.
- show an epilogue. It does not need to be animated, maybe just crawling text that tells us what happens after the defeat of the Blood God. Is the Red Pool still there? Does it still spawn monsters? (if not, the O5 may be disappointed, since they wanted those pink candies so hard). Will the player be promoted? But "promoted" in a world of monsters is not always good news: add some ominous reference to a next assignment, so you have a sequel hook. This is SCP, even the happy ending should be a bit CREEPY...
- at the end, show the Achievements I got in this game (distinguishing the new ones from "the ones that I already have but that I nevertheless achieved AGAIN in this game"). Otherwise, to know what I got, I have to remember the Achivemenent screen "before" the game and compare with the current one, it's annoying (e.g. in my case, I don't know with which game I got "Life Matters", I suppose it was the same where I got "Truly Optimized", but I can't know for sure). Show congratulations if I get Achievements, even if I lose: funny enough, I think I got the "Millionaire" and "Well Respected" achivements in a game I lost!
- The epilogue may be different according to the difficulty level and/or the way the game ended (the Achivements themselves?). What if the "Military Might" leads to a more militarized Foundation? On the other hand, who knows what effects a heavy focus on Genetics can have on the SCP universe?
- (maybe this is too much...) when the player gets an Achivement, you may give them some kind of bonus that they can spend in another game. The bonus may be given only the first time you get the Achivement, or every time (or it may be a lesser bonus for the second time and after).