Zelda II: The Adventure of Link (1986, though I was playing the GBA version) and Tetris (1989) when I was checking if my old GBC was still working.
On PC, it was Might & Magic: World of Xeen (1994),which is Might & Magic IV (1992) and V (1993) rolled together
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/