Challenge Maps
Challenge Maps was previously removed on the 24th of September 2025, though it has been made available through the Sandbox mode later.
It is not accessible anywhere else in the game. This page will attempt to include information about both the version before removal and its re-added version.
Challenge Maps were regular maps with modifiers applied to them, which increased their difficulty. It could be found in the Quests menu under the Challenges tab. Upon triumphing the map, players were rewarded with various rewards. This feature has been removed from the main game and can currently only be accessed through Sandbox mode.
Mechanics
Challenge Maps did not require anything to be activated, other than having a level requirement of Level 50. Rewards from a Challenge Map could only be claimed once each week. Losing granted no rewards other than
One Challenge Map appeared every week, resetting at 00:00 UTC on Sundays. The challenge was the same for each player.
Last Challenge
Challenges
- Every player has the Scout, Sniper, Demoman, Soldier and Hunter in their loadout. Wave structure is made harder, some enemy stats are altered, starting cash is set to
$700 ( $800 if in the Paradoxum Games group) and towers are intended to give back their total cost when sold. Detailed change list can be found here.
- After Wave 5, one type of tower will be locked per player each wave. Additionally, wave structure is updated to spawn more enemies and give them attributes, making it more challenging. Detailed change list can be found here.
- Enemies have their defense increased by 50% and are all given the Bloated attribute, while some of them have the Tank attribute. Starting cash is set to
$800 ( $900 if in the Paradoxum Games group) and wave bonus is boosted heavily. Detailed change list can be found here.
- Most enemies spawn twice, waves are altered to have stronger enemies and wave bonus is reduced. Starting cash is set to
$700 ( $800 if in the Paradoxum Games group). Detailed change list can be found here.
- Enemies have the Slime attribute. Several enemies are replaced by their stronger variant found in Polluted Wasteland II, such as the Abomination and the Nuclear Monster. Starting cash is set to
$1,400 ( $1,500 if in the Paradoxum Games group) and wave bonus is increased. Detailed change list can be found here.
- Enemies have the Nimble attribute. Starting cash is set to
$700 ( $800 if in the Paradoxum Games group). Detailed change list can be found here.
Sandbox-exclusive
- Hordes of enemies with few waves between new debuts and multiple boss fights as waves progress.
Other Maps
Certain maps also used the Challenge Maps system to alter the match, by for example changing statistics of enemies. However, they were not intended to appear as a proper Challenge Map which appeared in the Challenge Map rotation. These were all the map which use the Challenge Map system, but were not actually Challenge Maps as they could not appear as one of the Challenge Maps every week.
- Badlands II - Badlands II
- Portal to the Past - Classic Candy Cane Lane
- Return of the Korblox - Classic Winter
- Clash at the Forest Camp - Classic Forest Camp
- Tropical Turmoil - Classic Island Chaos
- Castle Siege - Classic Castle
- Pizza Party - Pizza Party
- Polluted Wasteland II - Polluted Wasteland II
Challenge History
If a challenge started in one month but ended in another, it will be listed in the month that it started in.
Update History
- 23 May 2024 - v1.23.0
- Challenge map system implemented, applied to The Classic Event, Polluted Wasteland II, Badlands II and Pizza Party.
- 21 June 2024 - v1.25.0
- Challenge Maps added.
- Challenges: Juggernaut, Jailed Towers, Back to Basics, Legion, Oops! All slimes!, Vanguard
- Challenge Maps added.
- 16 December 2024 - v1.46.0
- 24 September 2025 - v1.75.0
- Challenge Maps can now be accessed exclusively in Sandbox mode, as the challenges button has been removed, and replaced by Challenge Trials.
Notes
- ↑ Base rewards are
125, 4, 400 EXP and two Nukes. - ↑ Base rewards are
2, 100, 300 EXP and two High Grade Crates. - ↑ Base rewards are
125, 400 EXP, 3 and three Blizzard Bombs. - ↑ Base rewards are
100, 350 EXP, 3 and two Blizzard Bombs.