| Day | Title | Code | Tests | Tags | Visual |
|---|---|---|---|---|---|
| Day 1 | Sonar Sweep | code | tests | list of depths |  |
| Day 2 | Dive! | code | tests | positions, movements |  |
| Day 3 | Binary Diagnostic | code | tests | binary numbers, search, bit flip | |
| Day 4 | Giant Squid | code | tests | bingo, squid game |  |
| Day 5 | Hydrothermal Venture | code | tests | cartesian plane, intersections | |
| Day 6 | Lanternfish | code | tests | lanternfish, exponential growth |  |
| Day 7 | The Treachery of Whales | code | tests | moving crabs, minimum fuel, Gauss |  |
| Day 8 | Seven Segment Search | code | tests | seven segment display |  |
| Day 9 | Smoke Basin | code | tests | basin, flood, local min heights | visualisation |
| Day 10 | Syntax Scoring | code | tests | parentheses | |
| Day 11 | Dumbo Octopus | code | tests | game of life, flashing octopi | |
| Day 12 | Passage Pathing | code | tests | path finding | |
| Day 13 | Transparent Origami | code | tests | 2d coords, origami, flip coordinates | |
| Day 14 | Extended Polymerization | code | tests | polymers, replacements | |
| Day 15 | Chiton | code | tests | risk levels, cheapest path | |
| Day 16 | Packet Decoder | code | tests | binary, hex | |
| Day 17 | Trick Shot | code | tests | projectile motion | |
| Day 18 | Snailfish | code | tests | recursive addition | |
| Day 19 | Beacon Scanner | code | tests | 3d coords, translations | |
| Day 20 | Trench Map | code | tests | 3d coords, trenches | |
| Day 21 | Dirac Dice | code | tests | dice, 3-side die, multiverse |  |
| Day 22 | Reactor Reboot | code | tests | overlapping cubes | |
| Day 23 | Amphipod | code | tests | move and organize, best path | |
| Day 24 | Arithmetic Logic Unit | code | tests | operations, compiler, max & min | |
| Day 25 | Sea Cucumber | code | tests | Sea cucumbers moving linearly |