When catching Bugsnaxs in Bugsnax, you'll quickly find yourself filling up your Snakpack, which is the name given to your bug inventory.
The Snakpack can be considered the main inventory of Bugsnax, since there's only a finite number of both Bugsnax catching tools and clues, so you never have to worry about managing these items.
Thankfully, you can increase your bug inventory by completing side missions and, of course, catching Bugsnax.
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Snakpack inventory in Bugsnax explained
The Snakpack inventory is where you'll find all of the Bugsnax that you catch in, well, Bugsnax.
At the start of the game, you'll only be able to hold six Bugsnax in your Snakpack, but this can be eventually increased to 18.
If you catch a Bugsnax after completely filling your inventory, you'll be able to select which Bugsnax you wish to release, so that you can keep the newly catch Bugsnax.
You can find a small overview of which bugs are currently in your Snakpack by looking at the bottom left-hand corner of the screen. If you'd like a more detailed view, however, your journal has a page dedicated to your Snakpack inventory.
You'll receive the journal from Beffica before you first reach Snaxburg and, once you have it, you can open it whenever you like.
How to increase your Snakpack inventory in Bugsnax explained
If you want to increase your Snakpack inventory in Bugsnax, you first need to persuade Gramble to return to Snaxburg and reopen his ranch.
Once you've done that, interview Gramble and then talk to him again to start the 'Empty Nest!' side quest.
To complete this side quest, you need to donate any six Bugsnax that you like to Gramble's ranch. This is done by interacting with the donations box next to the Bugsnax pen and selecting which Bugsnaxs you wish to give to Gramble.
After donating six Bugsnac, your Snakpack will gain an additional four spaces, bringing it up to eight spaces in total. Make sure you talk to Gramble as well to complete the 'Empty Nest!' side mission.
You can now continue to donate Bugsnax to Gramble's ranch via the donation box to unlock the next two Snakpack upgrades.
To upgrade your Snakpack to 12 inventory slots, you'll need to donate 12 Bugsnax and, after this upgrade, you'll need to donate a further 18 Bugsnax to receive the final inventory upgrade, bringing it to a total of 18 spaces.
With the Snakpack fully upgraded, you can now go out and catch the maximum number of Bugsnax before returning to Snaxburg.