“Taint what a horse looks like, it’s what a horse be.”

-Granny Aching, Wintersmith, Sir Terry Pratchett

The first place winner clearly had a deep understanding of the form of a Froggo, illuminating a deeper truth than mere photorealism could.

Piggybacking onto this (all of these are FOSS):

Endless Sky is a 2D sandbox space sim. It’s a spiritual sequel to the old Escape Velocity: Nova, and has very active development.

Feudal Tactics is an extremely simple strategy game that can nonetheless be quite hard.

Battle For Wesnoth is a whole-ass fantasy campaign turn-based strategy game that has been ported to mobile. Think Warcraft but turn-based.

Arx Libertatis is a port of Arx Fatalis, a first-person RPG. This one is still on my list to try out, but it looks interesting.