The file dt80-300e-x64.cpk is a core data file for eFootball PES 2021 on PC. Here’s a useful, practical report on what it is, what it does, and what you can (and cannot) do with it.
1. What is this file?
Full path (typical): ...\eFootball PES 2021\Data\dt80_300e_x64.cpk Size: ~1.5–2 GB (exact size varies by game version/patch) Type: Konami CPK (CRI Packed File) archive Game role: Contains core database, gameplay parameters, and master data for the licensed leagues, teams, players, tactics, and more.
2. What data does it specifically hold? Unlike graphical CPKs (stadiums, faces, kits), dt80_300e_x64.cpk primarily holds: | Category | Examples | |----------|----------| | Player data | names, positions, attributes, skills, tactics, contract data | | Team data | lineups, formations, team tactics, manager info | | League/cup structure | competition rules, group stages, fixture schedules | | Master League & Become a Legend | default transfers, youth players, regen data | | Gameplay balance | difficulty scaling, referee tendencies, AI behavior weights | | Licensed content references | links to licensed leagues (Serie A, La Liga, etc.) | dt80-300e-x64.cpk pes 2021
⚠️ It does not contain stadium models, kit textures, boot models, or menu graphics.
3. Can you edit it directly? No — not safely or usefully with standard tools.
The file is encrypted and hashed by Konami. Direct modification will either: The file dt80-300e-x64
Crash the game on boot, or Be ignored (hash mismatch → file reverts).
Even hex editing changes will usually break the CRC check.
4. How do modders actually change its content? Modders do not edit dt80_300e_x64.cpk directly . Instead, they use live file loading or CPK repacking with fake signatures via tools like: What is this file
DpFileList Generator (for add-on CPKs) Sider (most common for PES 2021 modding) → Sider overrides player/team data without touching the original CPK. CPK Redownloader (for rebuilding with patched files)
Real-world example: