Conspiracy: The Solomon Gambit Essentials:

• No. of players: 2 - 4
• Playing time: 30 - 60 minutes
• Age: 14

Conspiracy: The Solomon Gambit - Rules of Play says:

In Conspiracy: The Solomon Gambit, a restoration of the 1973 classic game conspiracy, players vie for control of the agents by secretly paying them off and using them to move the briefcase across Europe, trying to get it to their HQ. But other players can challenge and stop an agent from moving if they have paid more than you — and for the right price they can even assassinate another agent.