I have to admit I struggled with these a lot more than the previous two rounds. Also difficult to not reuse some ideas since the themes are so similar!
Cartography: Text-based dungeon crawling but there's no automap and you have to draw the map yourself.
You don't play as the main character: Sherlock Holmes, but he's not actually very bright and you play as Watson and have to arrange the clues in the right order for him to pick.
Recycle: Scavenge the pieces to build your own ultimate CYCLE OF VIOLENCE (https://www.smbc-comics.com/comic/a-vicious-cycle).
Tunnels: First person, you see a map of the target facility and have to burrow under it, tunnel length is limited and you can also find bonuses if you're clever.
Pick your poison: You play as a dyslexic French fish salesman. Or something related to the Affair of the Poisons, idk.
Decay: The Grog Bartending Simulator.
Digging: You command a colony of dwarves and dig a 2D sideview underground city, but have to avoid Balrogs and other monsters and find gold.
Fishing: You're the worm and have to steer the fishing line to avoid getting eaten.
Push your luck: Build a tower that becomes more and more unstable and the parts that give more points are the hardest to fit.
Out of reach: Traversal-based puzzle where you see the goal in the beginning and have to figure out how to get there.
Symbiosis: Puzzle game where organisms consume and produce different chemicals and you need to find the right balance.
Shelter: Foraging RTS focused on the resource collecting side of the genre; forage resources and build shelters, but when the acid rain starts falling, the foragers only have limited time to reach the shelters.
Clockwork: Time sensitive puzzle platformer where you have to learn how the (one screen, let's not get crazy here) machine works to reach the goal.
Reflection: Metroidvania where you use mirrors to enter a mirror-world that is mostly identical, but certain objects have been flipped on the x-axis.
Out of order: Puzzle game where you have to order objects according to obscure criteria (albums by the age of the cover artist, games by the number of letters in their engine name). The criteria is not divulged but it shows which two objects are in correct order to begin with. Googling is encouraged.
Change the rules: Roguelike but the character is automated and you have to alter the generation rules for it to reach it the end of the maze.