This trophy will unlock once you fully upgrade your Water tank, Armor, Pickaxe, Drill, Steam punch and Lamp. It's highly recommended that this is done on your first playthrough because you won't have time to get this while speed running the game. You don't have much more money than what is required for all the upgrades, so don't buy too much dynamite, ladders or lamps, they are not even essential for the game, you can completely avoid buying them all together. Teleporters may also seem useful but don't buy too many of them either, you won't even need them in your first playthrough because you're not rushing through the game. If you buy too much teleporters, you might run out of enough orbs for the upgrades and they are very limited.

You can still get this trophy after you defeat the final boss because the game will just take your save file back to the last checkpoint before the boss, so you can still go into the mine, get gems and go back up to upgrade but if you run out of gems and orbs by wasting them on equipment, you will have to start the game over.