OEM website: "All games for the Tiny Arcade are free and open-source."
And yet
Omega Horizon: Source Code:Download (Unavailable) Yatzi: Source Code:Download (Unavailable) Leanna the Lion: Source Code:Download (no link)
Kemono Rogue: Source Code:(Unavailable)
Pac-Man: fee and locked
Ms. Pac-Man: fee and locked
Galaxian: fee and locked
Dig Dug: fee and locked
Galaga: fee and locked
Frogger: fee and locked
Space Invaders: fee and locked
alysdexiaAll of the games we have released are Arduino based and are indeed free and open source, the first 4 you mentioned were contributed by users and you can find links to the individual pages that the individual users maintain on the TinyCircuits forum. The other games you listed are not for this Tiny Arcade kit, but for a retail version that is sold by a different company (Super Impulse), which is not the same hardware as this kit and is not the same product.
And yet
Omega Horizon: Source Code: Download (Unavailable) Yatzi: Source Code: Download (Unavailable) Leanna the Lion: Source Code: Download (no link) Kemono Rogue: Source Code: (Unavailable) Pac-Man: fee and locked Ms. Pac-Man: fee and locked Galaxian: fee and locked Dig Dug: fee and locked Galaga: fee and locked Frogger: fee and locked Space Invaders: fee and locked