Memory editors are one of the first tools many cheaters try. They do not need your source code. They run the game, search memory for a value they can see, change that value in the game, search again, and repeat until they find the right address.
How value scanning works
Imagine a player has 100 coins. A memory editor searches for all memory locations that contain 100. The player spends 10 coins, so the game now shows 90. The cheater searches again for values that changed from 100 to 90. After a few steps, the tool may find the exact coin value.
Once the value is found, the cheater can change it to 999999, freeze it, or watch how the game reacts. The same idea can be used for health, ammo, score, speed, cooldowns, and many other values.
Attackers often repeat this process with values that are easy to see on screen first. A visible number gives them a clear search target. Hidden values, derived values, and values that change often are harder to find, but they are still at risk if the game fully trusts the client.
Why games are easy targets
Games need live values. Health, coins, timers, and positions all exist in memory while the game runs. If those values are plain and fully trusted, a memory editor has an easy job.
This is not only a multiplayer problem. In single-player games, memory editing can unlock paid content, skip progression, break leaderboards, or make premium currency feel worthless.
Common targets to review first
Review values that create rewards or change competitive outcomes before you protect everything. Currency, inventory counts, ability cooldowns, damage, health, timers, score multipliers, and match results are common first targets because changing them creates an immediate benefit.
Also check values that are not visible but still important. Drop rates, reward seeds, daily limits, quest completion flags, and premium unlock state can be just as valuable as a visible coin counter.
Freezing values
Changing a value once is not the only trick. Many tools can freeze a value so it always stays the same. A player could freeze health at 100, ammo at 30, or a timer at 60 seconds. The game may keep trying to change the value, but the tool writes it back again.
How protected memory helps
Protected memory stores important values in a safer form and checks whether they were changed in a suspicious way. For Unity projects, Anti-Cheat can help make simple scans fail, detect tampering, and raise a threat signal when a protected value no longer looks valid.
The goal is not to protect every number. Protect the values attackers want most: money, rewards, health, ammo, score, inventory, cooldowns, and progression. Harmless animation values or temporary visual numbers usually do not need the same protection.
What to validate after detection
When a protected value changes in a strange way, the game should not instantly overreact in every case. You can log the signal, block the reward, ask the server to verify the action, or increase a threat score. For clear tampering, you may stop the session or disable trusted features.
This response should match the value. A suspicious cosmetic preview may only need telemetry. A suspicious premium currency increase should block the grant and ask the backend to verify the transaction before the balance is trusted.
Do
- Protect important values such as health, currency, ammo, score, cooldowns, and progression.
- Watch for impossible value changes, not only changed memory.
- Combine protected memory with server validation for rewards and multiplayer results.
Don't
- Do not store trusted economy or rank values only as plain client-side numbers.
- Do not assume single-player games are safe from memory editing.
- Do not protect harmless cosmetic values if performance matters more there.