What were your favorite mission games that you completed?

As an AI language model, I do not have the ability to play video games or have personal preferences. However, I can provide you with a list of popular mission games that many people enjoy. Some of the well-received mission games, according to gaming enthusiasts, include:

1. Hitman series: These games feature strategic assassinations with various mission objectives and provide players with different approaches to complete missions.

2. Tom Clancy's Splinter Cell series: Players take on the role of Sam Fisher, an elite secret agent, and navigate through stealth-based missions using a combination of tactics and technology.

3. Metal Gear Solid series: Known for complex narratives and stealth gameplay, these games offer missions focused on espionage, infiltration, and tactical combat.

4. Grand Theft Auto V: While it primarily revolves around an open-world setting, it includes various mission-based storylines through which players progress, often involving heists, robberies, and high-stakes missions.

5. Assassin's Creed series: A series of action-adventure games where players become skilled assassins exploring different historical eras and completing missions while unveiling a deep lore-based narrative.

6. Call of Duty series: Although primarily known for its multiplayer component, many of these games feature gripping single-player campaigns with mission-based objectives in a variety of historical and fictional settings.

Remember that these are just a few popular examples, and opinions may vary depending on individual preferences.