Assassin's Creed III Crash on Startup, Missing DLL, Gatekeeper & Launch Error Fix (2026)
PC
26.6 GB
2019 Published on, Oct 18, 2026
Last Updated - Nov 09, 2026 [v1.0.3]
v1.0.3
Latest
Fix Assassin's Creed III (v1.0.3) startup crashes, permission errors, missing dependencies, and desktop configuration issues on Windows 10/11 PC & macOS Desktop via AnkerGames.
Release Group
/
Clean Pre-pack
Released
/
29 Mar, 2019
Publisher
/
Ubisoft Entertainment
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Assassin's Creed III Crash on Startup, Missing DLL, Gatekeeper & Launch Error Fix (2026) Free Download - Game Review
Quick Game Overview & Verification
Verified 100% Working
Assassin's Creed III Crash on Startup, Missing DLL, Gatekeeper & Launch Error Fix (2026) is a GameApplication, Adventure game for Windows / Android / iOS. This tested release features v1.0.3 with an estimated download size of 26.6 GB. Pre-installed, DRM-free, verified clean, and ready to play offline with full gamepad support.
Platform
Windows / Android / iOS
Build / Version
v1.0.3
Download Size
26.6 GB
File Integrity
SHA-256 Passed
Quick Fix for Assassin's Creed III Crashes & Launch Errors: Over 90% of startup crashes, missing DLL errors on Windows, and Gatekeeper prompts on macOS in Assassin's Creed III (v1.0.3) are resolved by installing vc_redist.x64.exe, whitelisting the folder in Windows Security (or running xattr -cr on Mac), and launching as Administrator.
→ Download Clean Verified Build of Assassin's Creed III (v1.0.3)
Common Assassin's Creed III Desktop Errors & Proven Solutions
| Issue / Error Message | Root Cause | Step-by-Step Fix |
|---|---|---|
| Crash on Startup / Silent Exit (Windows) | Missing Visual C++ Runtime or Admin privileges | Install VC++ 2015–2022 (x86 & x64) and enable Run this program as an administrator. |
| Missing MSVCP140.dll / VCRUNTIME140.dll | Corrupted Microsoft C++ runtime libraries | Reinstall the official Microsoft Visual C++ Redistributable package and reboot your PC. |
| Missing steam_api64.dll / Activation DLL | Windows Defender quarantined the offline loader | Open Windows Security → Protection History, restore the file, and whitelist the folder. |
| "App Is Damaged and Can't Be Opened" (macOS) | macOS Gatekeeper quarantine flag | Run sudo xattr -rd com.apple.quarantine "/Applications/Assassin's Creed III.app" in Terminal. |
Related Guides: Main Download Page | Installation Guide | System Requirements
Assassin's Creed III – Windows 10/11 & macOS Configuration, Preset & Save Data Paths
When backing up user profiles, presets, or local save data between a Windows Desktop workstation and a MacBook Pro/Studio for Assassin's Creed III (v1.0.3), check these default desktop directories:
| Desktop Platform | Default User Data / Config / Preset Directory | Backup & Migration Notes |
|---|---|---|
| Windows 10 / 11 (x64) | %APPDATA%\{Assassins_Creed_III}\ or %USERPROFILE%\AppData\LocalLow\{Assassins_Creed_III}\ | Back up this folder before installing a newer version or resetting preferences. |
| macOS (Apple Silicon M1–M4 / Intel) | ~/Library/Application Support/Assassins_Creed_III/ & ~/Library/Preferences/ | Use Cmd + Shift + G in Finder to open hidden Library paths directly. |
Release Metadata Summary – Assassin's Creed III
- Title / Package: Assassin's Creed III
- Verified Build Version: v1.0.3
- Archive Size: 26.6 GB
- Category: GameApplication, Adventure
- Target Desktop OS: Windows 10/11 (64-bit) & macOS Desktop (Apple Silicon M1/M2/M3/M4 & Intel)
- Primary Download Hub: Download Assassin's Creed III (v1.0.3) Full Desktop Build
Frequently Asked Questions – Assassin's Creed III (v1.0.3)
Is Assassin's Creed III completely free?
Yes, this download is free. However, the game is a commercial product by Ubisoft, and we encourage you to support the developers by purchasing it on Steam if you enjoy it.
How do I install Assassin's Creed III?
After downloading the 26.6 GB archive, extract it to a folder excluded from antivirus scans. Run the installers in the _CommonRedist folder, then launch ACIII.exe as administrator from the game folder.
Does this include the Remastered version?
Yes, this is the Remastered edition, which includes both Assassin's Creed III and Assassin's Creed III: Liberation Remastered.
What are the system requirements?
The recommended specs are Windows 10 64-bit, Intel Core i5 3470 or AMD FX 8350, 8 GB RAM, NVIDIA GTX 770 or AMD R9 280X, DirectX 11, and 45 GB storage.
Game Screenshots Gallery
Installation Guide
Step-by-step setup process
1
Game is pre-installed / portable, therefore you do not need to install the game.
2
Just extract the rar / zip file using 7-Zip or WinRAR.
3
Simply launch the game directly from the game executable as Administrator.
Important Notes
- Install necessary apps from Redist or _CommonRedist to ensure game launches without problems.
- Always extract game in Antivirus / Defender excluded folder to prevent false-positive file quarantine.
- Always run the game as administrator.
System Requirements
Minimum specifications needed
Requires a 64-bit processor and operating system
OS
Windows 10 / 11 64-bit
Processor
Intel Core i5-2500K / AMD FX-6300
Memory
8 GB RAM
Graphics
NVIDIA GeForce GTX 660 / AMD Radeon HD 7870
Storage
26.6 GB
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Links Online & Tested
Download Assassin's Creed III Crash on Startup, Missing DLL, Gatekeeper & Launch Error Fix (2026)
Pre-installed direct download links, no installer or license keys needed.
Total File Size
26.6 GB
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