Index
Description
The Index is a menu where players can see how many Logbooks for enemies they have gotten, how many maps they have triumphed and their achievement progress.
Enemies
The enemies section can be used to see how many enemies the player has unlocked. By default, only a few enemies are shown here as locked, though in reality every single enemy in the game, including unused ones, can appear here as long as they still exist in the game. Because of this, the Operation I.C.E Event enemies can appear here if their Logbooks are obtained, though they do not appear by default. Enemies that no longer appear anywhere in the game, such as the Tower Defense Simulator x PLS DONATE Event could actually appear here if their Logbooks were somehow obtained.
This section will display information on the enemy. Every enemy will list its default health value, which is its health that will appear in a mode if it is not overriden by a mode specific health value and its speed. If either one of these is set to nothing, it will be displayed as "No logbook description available.". For some enemies, their description will also be included, which is the lore of the enemy. Next to the icon, the mode appearance will be displayed. On the side the enemy model walking will be shown.
The number of obtained Logbooks is displayed in-game, with the maximum number displayed being all the enemies displayed as locked for a new player. This is not actually the maximum number of Logbooks as it gets increased when obtaining Logbooks from non-evergeen enemies. It is possible to search for enemies based on their name. It is also possible to sort them based on what mode they appear in. The available modes change based on what enemies are displayed in the Index.
Any enemies obtained through Logbooks can be spawned in the Sandbox mode, in multiple cases their legacy variants will also be unlocked, even if they do not appear in the Index.
Maps
The maps section can be used to see how many maps the player has triumphed in. Unlike the enemies section, maps can actually be selected without unlocking them. On the side, the map name and icon will be displayed with a glow around the image based on its difficulty. Below that, the total number of triumphs, losses, the win and loss ratio, and the best time on the map will be displayed. Under it, every mode the map is playable on will be displayed. It will have a progress bar that fills up the further the player gets, reaching 100% on the final wave.
There is a counter for how many maps were beaten in at least one mode. Next to it, there is a search bar used to look up maps in it. It is also possible to sort maps by difficulty or if they were beaten or not.
Triumphing any map (excluding event maps) unlocks it in the Index and gives the player the ability to use it in the Sandbox mode.
Achievements
Achievements are goals which, when reached, reward the player with a Title and a different rewards, generally 
The objectives for the achievements vary. Some of them may be just counters, such as Logbooks obtained, or objectives that need to be beaten once, such as triumphing Pizza Party in a Solo.
For rewards, the Titles will not be listed, as every single achievement gives one. The only exception is achievements where the name of a Title is different from the achievement name.
Towers
Damage
These achievements do not run concurrently alongside each other and you can only start a higher damage achievement upon the completion of a previous damage achievement.
Mission Quests
Logbooks
Tower Skins
Triumphs
Hidden
Null & Void
All of these achievements are no longer obtainable.
The Final Act
All of these achievements are no longer obtainable.
Hardcore/Voidcore
Solar Requiem
Gallery
Miscellaneous
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First icon (16 December 2024 – 20 December 2024)
Notes
