BioShock Infinite: The Complete Edition
80 Achievements
1,670
40-50h
Xbox One
Xbox Series
Scavenger hunt
Completed the Main Campaign in 1999 Mode without purchasing anything from a Dollar Bill machine.
75
1.1%
How to unlock the Scavenger hunt achievement in BioShock Infinite: The Complete Edition - Definitive Guide
NoHeroes94
TrueAchievements
TrueAchievements
Not so much a guide, but a clarification.
Strongly recommend you go for this during your 1999 model run, as you will have to repeat 1999 mode to do this otherwise.
Notes:
- If you forget momentarily and accidentally press X by a Dollar Bill machine (perhaps when possessing it for cash and collecting the Silver Eagles) DO NOT WORRY. As long as you physically haven't bought anything, you'll be fine. Looking through the menu doesn't void the achievement. If you did buy something, I can't guarantee that loading an old chapter on 1999 works, but I don't see why it wouldn't.
- Veni! Vidi! Vigor! machines are 100% fine to use. These are for vigor upgrades. Buy away, just remember to prioritize upgrading Return to Sender and Devils Kiss to make the 2 hardest fights monumentally easier (see the superb Auld Lang's Syne solution by another player)
- Minutemen Armory machines are 100% fine to use. These are for gun upgrades. Buy away. Just remember to prioritise upgrading your favourite weapons and don't waste cash on guns like the pistol or machine gun with low DPS.
Strongly recommend you go for this during your 1999 model run, as you will have to repeat 1999 mode to do this otherwise.
Notes:
- If you forget momentarily and accidentally press X by a Dollar Bill machine (perhaps when possessing it for cash and collecting the Silver Eagles) DO NOT WORRY. As long as you physically haven't bought anything, you'll be fine. Looking through the menu doesn't void the achievement. If you did buy something, I can't guarantee that loading an old chapter on 1999 works, but I don't see why it wouldn't.
- Veni! Vidi! Vigor! machines are 100% fine to use. These are for vigor upgrades. Buy away, just remember to prioritize upgrading Return to Sender and Devils Kiss to make the 2 hardest fights monumentally easier (see the superb Auld Lang's Syne solution by another player)
- Minutemen Armory machines are 100% fine to use. These are for gun upgrades. Buy away. Just remember to prioritise upgrading your favourite weapons and don't waste cash on guns like the pistol or machine gun with low DPS.
2 Comments
Just going to comment here and confirm: If you buy something from a vending machine YOU CAN RELOAD A PREVIOUS SAVE. The achievement will still unlock 
By KotesMcGotes on 04 Aug 2020 13:46
Great tips, thanks!
By GR34TD3STR0Y3R on 08 Aug 2022 23:50
Stevey_Bear
TrueTrophies
TrueTrophies
I've written the strategy that I took to complete the game in 1999 mode in another post, so I won't say the same thing here. In regards to not using a Dollar Bill, this is amazingly easy. There was not one occasion where I needed something from the Dollar Bill machines, just make sure you search all area's thoroughly. Also, don't worry if you do access one, as long as you do not purchase anything... as I did this a couple of times by accident and the Trophy still popped at the end.
