AC2 uPlay Unlocker

A tool for unlocking DLC and uPlay rewards in Assassin's Creed II save files. Supports both PC and PS3 OPTIONS files.

Usage

python ac2_uplay_unlocker.py <OPTIONS_FILE>

Examples:

python ac2_uplay_unlocker.py OPTIONS        # Auto-detect format
python ac2_uplay_unlocker.py OPTIONS.PC     # PC format
python ac2_uplay_unlocker.py OPTIONS.PS3    # PS3 format

Controls

Key	Action
↑/↓ or j/k	Navigate
Space or Enter	Toggle selected unlock
A	Enable all unlocks
N	Disable all unlocks
S	Save changes
Q or Esc	Quit

Supported Unlocks

Templar Lairs (Exclusive Maps)

Unlock	Description
Palazzo Medici	"Home Invasion"
Santa Maria Dei Frari	"Over Beams, Under Stone"
Arsenal Shipyard	"Shipwrecked"

uPlay Rewards

Unlock	Description
Additional Throwing Knives	Increases knife capacity
Altaïr Outfit	Classic Altaïr costume
Auditore Family Crypt	"Paying Respects" - Exclusive map

Promotional Content

Unlock	Description
Bonus Skin	Verizon promotion exclusive

PSP Bloodlines Connectivity Weapons

Unlocks weapons from AC: Bloodlines (PSP) save data transfer:

Weapon
Maria Thorpe's Longsword
Fredrick's Hammer
Mace of the Bull
Dark Oracle's Bone Dagger
Twin's Rapier
Bouchart's Blade

Platform Differences

PC Format

• No header or checksum
• Direct read/write of unlock values
• File typically named OPTIONS in save directory

PS3 Format

• 8-byte header: size (4 bytes, big-endian) + CRC32 (4 bytes, big-endian)
• CRC32 parameters:
  • Polynomial: 0x04C11DB7
  • Initial: 0x00000000
  • XOR Out: 0x1BF3278A
  • Reflect Input/Output: Yes
• Requires re-signing with Bruteforce Save Data or similar tool after editing

Technical Details

Unlock Structure (Type 0x0E)

Standard boolean unlocks use an 18-byte structure:

0E 00 00 00 [HASH:4] 00 00 00 00 00 00 00 00 0B [VALUE]

• 0E 00 00 00 - Type identifier (little-endian)
• [HASH:4] - 4-byte hash identifying the unlock (little-endian)
• 00...00 - 8 bytes padding
• 0B - Marker byte
• [VALUE] - 00 = locked, 01 = unlocked

PSP Weapons Structure (Type 0x17)

The Bloodlines weapons use a dynamic boolean array:

17 00 00 00 [HASH:4] 00 00 00 00 06 00 17 00 0B 06 00 00 00 [6 BOOLS]

• 17 00 00 00 - Type identifier
• [HASH:4] - Hash 0xD92D49F7
• 4-byte counter after 0B marker indicates 6 boolean values
• Each weapon is a single byte: 00 = locked, 01 = unlocked

Known Hashes

Hash	Unlock
0x41027E09	Palazzo Medici
0x788F42CC	Santa Maria Dei Frari
0x6FF4568F	Arsenal Shipyard
0x1854EC5A	Bonus Skin
0xC25CE923	Additional Throwing Knives
0x196CAF1F	Altaïr Outfit
0x55BEEF7D	Auditore Family Crypt
0xD92D49F7	PSP Bloodlines Weapons (array)

PS3 Save Editing Workflow

1. Decrypt save with Bruteforce Save Data or PFDTool
2. Run this tool on the OPTIONS file
3. Enable desired unlocks and save
4. Re-sign/re-encrypt save with Bruteforce Save Data

Requirements

• Python 3.6+
• No external dependencies (curses is optional for enhanced UI)

License

Public domain - Use freely for personal save editing.