A geek of the highest order, Terence speaks a great number of (programming) languages and dabbles in a couple of tech fields. He writes about common problems programmers come across in this blog.
This article is a part of the series:
Creating a Metroidvania (like Hollow Knight) in Unity
This post will be free until the video is released.
In Part 15 of our tutorial series, we will be working on implementing a new and improved save system that supports multiple slots for our game. This new save system will be more robust and less buggy than our old implementation, which used the deprecated (and less flexible) BinaryWriter class in C#, and had a multitude of problems as a result.
This article is a part of the series:
Creating a Rogue-like Shoot 'Em Up (like Vampire Survivors) in Unity
💡 Update 7 November 2025: Some bugs were found with the content for this part by our Patron Grim Rubbish. These bug fixes are addressed in this post here.
Now that we've set up a coin collection system from the previous part, we're now ready to improve upon the very simple treasure chest that we've implemented in Part 12 to faciliate weapon evolution. In this part, we’ll enhance the treasure chest system to more closely mirror the mechanics seen in Vampire Survivors.
Our upgrades will include the ability for chests to level up existing weapons and passives, grant entirely new ones, and reward players with multiple items at once—ranging from 1, 3, or even 5 rewards per chest.
This article is a part of the series:
Creating a Metroidvania (like Hollow Knight) in Unity
In Part 14, we are going to be improving upon the pickup system, and the UI overlay that pops up when you pick up an item. We are also going to be using the hit stop system that we made in Part 11 for the UI interlude that happens whenever we pick up an item.
This article is a part of the series:
Creating a Rogue-like Shoot 'Em Up (like Vampire Survivors) in Unity
In the next part of our tutorial series, we will be implementing a save functionality for our coins and coin pickups. We'll be introducing a coin system that persists across play sessions, allowing players to track their progression. Alongside this, we'll add new pickups that reward players with coins during gameplay.
Currently, there are no persistent rewards tied to completing levels. By introducing collectible and usable coins, we create a more engaging experience where players feel rewarded for their efforts and have meaningful goals to work toward.
This article is a part of the series:
Creating a Metroidvania (like Hollow Knight) in Unity
In the last part, we focused on building a new, modular and much simpler way of handling UI. We are following this up in Part 13 by upgrading and simplifying the code for our health and mana UI as well, as there are a couple of problems with it.
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