There is a separate stealth-action game titled The Plan . Because it shares a similar tactical vibe, many download sites bundled it or renamed it to trick fans looking for a sequel.
If you are looking for a true, high-quality sequel, there is good news. An official prequel titled is currently in development by Antimatter Games . Setting: The 1980s Cold War. igi-3-the-plan-pc-game-free-download-full-version
It is slated for a future release on Steam and consoles, rather than being a "free download" on sketchy third-party sites. Safety Tips for Downloading If you decide to revisit the classics or try out fan mods: There is a separate stealth-action game titled The Plan