General

What does the HP in the top left corner represent?

 * It represents the HP of the weakest enemies in your current wave. Since all enemies' HP scales off that value, you can consider it the minimum HP value of each enemy in your current wave. There is a wave HP calculator that can be found on the Documents page.

How does the HP of enemies scale?

 * In the case of regular enemies, wave Mini-Bosses / Bosses, Drones and Resource Haulers, their HP scales depending on your current wave, so these enemies will get stronger as you get into higher waves, and naturally, the scaling resets whenever you prestige. Each wave has a fixed HP value that is attributed to the enemies, so repeating the same wave multiple times, or going back in waves because you were defeated does not increase the HP of the enemies you have to face. There is a wave HP calculator that can be found on the Documents page.
 * In the case of Cargo and Tech Ships, their HP increases only when you kill them (therefore, spawning them multiple times doesn't affect their HP as long as you don't kill them), meaning that, eventually, you will need long-lasting runs in order to have a chance to bring down these ships. Keep in mind that these ships also have fixed values depending on the amount of times you kill them, with HP reducing upgrades being applied after whatever HP value one of these ships have. There are both a tech ship and cargo ship HP calculators that can be found on the Documents page.

What are Resource Haulers/Drones/Cargo Ships/Tech Ships/Bosses?

 * Resource Haulers (a.k.a. Haulers) are enemies that appear with chests. These spawn every wave that ends with -3 (ex: wave 43) or -8. They drop more gold than your regular enemy, and they might also drop some essence (based on your upgrades).
 * Drones are enemies that spawn when you activate Drone Swarm. These drop more gold than your regular enemy, and it's wise to kill them for that, but you can also kill them for XP to level your monsters. Base cooldown of 20 minutes.
 * Cargo Ships are large ships that you unlock at wave 80. When you spawn one, it lasts either 30 seconds or until you kill it. They drop gold, essence and gems, all of which can be upgraded to drop more. Base cooldown of 4 hours.
 * Tech Ships are large ships that you unlock at wave 400. Same lifespan as Cargo Ship (30 seconds or until it dies). It drops a single Tech Scroll, which can be upgraded through a Tier 4 Artifact and a Tech Tree upgrade to drop up to 5 scrolls per kill. Increasing the scroll drop also increases how many scrolls you get when purchasing Resource Packs with gems (up to 250 in Res. Pack 4). The first spawn every day is free, the second costs 100 essence, and each spawn after that costs 50 more essence than the previous. Essence cost keeps scaling, regardless of whether or not you kill it, resetting every day.
 * Bosses are enemies that have blue health bars. They're stronger than regular enemies, so be careful! A Mini-boss spawns every wave that ends with -5, and a Boss spawns every wave that ends with -0. Cargo Ships, Tech Ships and Haulers are also considered bosses, for the sake of damage upgrades you might end up unlocking.

What's the highest level for upgrade [X]?

 * Refer to the following list/spreadsheet for detailed info on all upgrades of the game:

"IMTD Public Data"

Where are the Monster Evolutions?

 * The process of evolving monsters isn't necessarily a feature in this game. Instead, the variants of a monster type/family (ex: Fluffy, Fluffier, Fluffiest) are what is advertised as monster evolutions. In other words, monster evolutions are technically present in the game, however, the only process related to them is unlocking new monster tiers that reveal new variants of the same monster type/family.

What are the Super Crits?

 * Super Crits are a feature/mechanic that act as an "overflow" of regular crits, dealing 3x as much damage as a regular crit. In order to apply these Super Crits, you first need to reach 100% Crit Chance. Afterwards, any excess Crit Chance (after 100%) will be the chance to get a Super Crit instead (ex: 103% Crit Chance = 100% Crit Chance + 3% chance for Super Crit instead).

What do the different colors of damage mean

 * White damage: normal hit
 * Grey damage: Regular crits
 * Red damage: Super Crits
 * Blue damage: Area of effect type damage such as the burn aura from Heatrash and the Flame Bounce from fire monsters