Tell me whether these games are exclusives or multi-platform: The Legend of Zelda, Call of Duty, Sly Cooper, God of War, Counter-Strike, Mario, Pokemon, Halo, Dota, League of Legends.
The Legend of Zelda, Sly Cooper, God of War, Mario, Pokemon and Halo have been at least been historically advertised and classified as console exclusives: Zelda, Mario and Pokemon on Nintendo platforms, God of War and Sly Cooper on Sony Playstation platforms, Halo on Microsoft Xbox Platforms.

Lately, some of the games above, God of War and Halo, have been ported PC which makes them multi-platform games. God of War is considered as a timed exclusive to Playstation systems where the game was exclusive to the console for several years before being released to other platforms, in this case PC.

Halo has recently became PC and Xbox multi-platform dur to Microsoft's push to bring more of their console games to their PC gaming platform.

Rest of the games, Call of Duty, Counter-Strike, Dota and League of Legends are considered multi-platform as they have been released to multiple types of systems without ever being advertised as exclusive to one. 

Be mindful that releasing a game to Windows PC and Apple MacOS is considered as multi-platform.