Play all of Hunter's routes.

Kidnap the professor and reach Hunter's A ending.

Play all of Sergei's routes.

Kidnap the professor and reach Sergei's B ending.

Kidnap the professor and reach Sergei's A ending.

Steal the diamond and reach Sergei's B ending.

Steal the diamond and reach Sergei's A ending.

Play at least one of Sergei's routes.

Kidnap the professor and reach Hunter's B ending.

Steal the diamond and reach Hunter's B ending.

Steal the diamond and reach Hunter's A ending.