Baseline (Widescreen) Solution & Issues
The Game only offers 4:3 resolutions - you need to HEX edit to get other resolutions.
1. Download Squ1zZy's Resolution Tool for Pirates of the Caribbean: At World's End --> http://www.wsgf.org/forums/viewtopic.php?f=64&t=21680
2.Extraxt Squ1zZy_ResPatcher_Pirates_Of_The_Caribbean_Worlds_End.rar into the Game root and replace all Files.
3.Run the Tool and change your des. Res.
4.For 2560 x 1440 you need to do it yourself via hex edit: Look for 80 02 66 C7 40 02 E0 01 and change it to 00 0A 66 C7 40 02 A0 05
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Same Solution as in Widescreen desc. See WSGF Links for ResHex: Resolution to Hex Calculator.
For 2560 x 1080 you need to do it yourself via hex edit: Look for 80 02 66 C7 40 02 E0 01 and change it to 00 0A 66 C7 40 02 38 04
For 3440 x 1440 you need to do it yourself via hex edit: Look for 80 02 66 C7 40 02 E0 01 and change it to 70 0D 66 C7 40 02 A0 05
Eyefinity / Surround Specific Solution & Issues
Same Solution as in Widescreen desc. See WSGF Links for ResHex: Resolution to Hex Calculator.
4k UHD Specific Solution & Issues
Same Solution as in Widescreen desc. See WSGF Links for ResHex: Resolution to Hex Calculator.
For 3840 x 2160 you need to do it yourself via hex edit: Look for 80 02 66 C7 40 02 E0 01 and change it to 00 0F 66 C7 40 02 70 08