Full list of all 37 Save Room - The Merchant achievements.
The base game contains 21 achievements, and there is 1 DLC pack containing 16 achievements.
Complete level XXI
Complete level XIX
Complete level XVII
Complete level XV
Complete level XIII
Complete level XI
Complete level IX
Complete level VII
Complete level V
Complete level III
Complete level I
Complete level XXIII
Complete level XXV
Complete level XXVII
Complete level XXIX
Complete level XXXI
Complete level XXXIII
Complete level XXXV
Complete level XXXVII
Complete level XXXIX
Complete all levels
Perform 250 item combinations
Buy a total of 1,000,000 ptas worth in items
Sell a total of 1,000,000 ptas worth in items
Bought 100 itens from the merchant
Mark and sell multiple items at once
Mark and buy multiple items at once
Examine 25 items
Upgrade a weapon to the max specs at once
In level 39, acquire access to the shop in less than 90 seconds
Beat level 40 in less than 4 minutes
Sell a treasure of every type
Craft 1000 ammunition pieces of any kind
Spend a total of 1,000,000 ptas worth in weapon upgrades