File-based save system in Unity - Mini Project: Build & Apply

File-based save system

📖 Scenario: You are making a simple game in Unity where the player can save their score to a file and load it later.

🎯 Goal: Build a file-based save system that writes the player's score to a file and reads it back.

📋 What You'll Learn

Create a variable to hold the player's score

Create a string variable for the file path

Write the score to a file using File.WriteAllText

Read the score from the file using File.ReadAllText

Print the loaded score to the console

💡 Why This Matters

🌍 Real World

Saving player progress or settings in games is common. This project shows how to save simple data to a file.

💼 Career

Understanding file input/output is important for game developers and software engineers to manage data persistence.

1

Create the player's score variable

Create an int variable called playerScore and set it to 100.

Unity

# Create an int variable called playerScore and set it to 100
# Your code here

Need a hint?

Use int playerScore = 100; to create the variable.

2

Create the file path variable

Create a string variable called filePath and set it to "savefile.txt".

Unity

int playerScore = 100;
// Create a string variable called filePath and set it to "savefile.txt"
// Your code here

Need a hint?

Use string filePath = "savefile.txt"; to create the file path.

3

Write the score to the file

Use System.IO.File.WriteAllText to write the playerScore as a string to the file at filePath.

Unity

int playerScore = 100;
string filePath = "savefile.txt";
// Write playerScore to the file at filePath
// Your code here

Need a hint?

Use File.WriteAllText(filePath, playerScore.ToString()); to save the score.

4

Read and print the score from the file

Use System.IO.File.ReadAllText to read the score from filePath into a string variable called loadedScore. Then print loadedScore using Debug.Log.

Unity

using System.IO;

int playerScore = 100;
string filePath = "savefile.txt";
File.WriteAllText(filePath, playerScore.ToString());
// Read the score from the file into loadedScore
// Print loadedScore using Debug.Log
// Your code here

Need a hint?

Use string loadedScore = File.ReadAllText(filePath); and Debug.Log(loadedScore);.