To aim and shoot effectively, use the crosshair to target enemies. Take into account factors like distance and wind. Hold your breath to steady your aim for a more accurate shot.

Contracts are specific missions where players must complete objectives, like eliminating a target under certain conditions. Completing contracts can earn you rewards and unlock new missions.

You can unlock new weapons by completing missions, contracts, or through in-game achievements. Progressing through different levels will gradually give you access to more powerful sniper rifles.

To succeed in difficult missions, consider the following strategies: 1. Study enemy patterns. 2. Plan your shots based on surroundings. 3. Use distractions to separate targets. 4. Practice patience and wait for the right moment to shoot.

Yes, to achieve higher scores, focus on completing missions quickly, using headshots, and minimizing noise. Additionally, consider using environmental kills and aiming for multipliers by taking down multiple targets at once.