Prototype Mansion - Used No Cover

Prototype Mansion - Used No Cover

16 achievements

Ultra Rare×9

Very Rare×6

Rare×1

About Prototype Mansion - Used No Cover's achievements

Prototype Mansion - Used No Cover has 16 Steam achievements, 9 of them ultra-rare — unlocked by under 5% of players. The rarest is "S-Rank Champagne Party!", earned by just 1.7% of players. Below is the complete achievement list with global rarity and a full achievement difficulty breakdown.

Rarest achievement

1.7%

of players earned "S-Rank Champagne Party!"

🗺️ Community guides & walkthroughs

Community Ratings

No ratings yet

Difficulty—

Easy → Brutal

Enjoyment—

Meh → Loved it

Grindiness—

No grind → Huge grind

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All Prototype Mansion - Used No Cover achievements

16 achievements

S-Rank Champagne Party!

Achieved S-Rank when completing the game.

Ultra Rare1.7%

Impervious

No damage taken.

Ultra Rare1.7%

???

Hidden achievement — tap Reveal secrets to spoil

Ultra Rare1.9%

Hard Mode

Beat the game on hard mode.

Ultra Rare1.9%

Undead Friend

No zombies were harmed in the making of this achievement.

Ultra Rare2.6%

Just What The Hell Is Going On Here?

Read a lot of documents.

Ultra Rare2.8%

You Little Monster

Defeated the final boss.

Ultra Rare3.4%

Fully Loaded

All weapons & upgrades.

Ultra Rare3.5%

That's... not okay

Become the master of unlocking.

Ultra Rare4.6%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare5.3%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare7.5%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare8.8%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare9.0%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare10.0%

???

Hidden achievement — tap Reveal secrets to spoil

Very Rare10.5%

Gold Star

Beat the game.

Rare25.8%