MAP20: System Overdrive (Blitz: Race Against Time)

Blitz: Race Against Time maps
Ep.1: City 01 02 03 04 05 06 07 08 09 10
Ep.2: Techno MAP11: YOURE CAR MAP12: Nar Shaddaa MAP13: Grunting hounds MAP14: Portal Control MAP15: Romero get into the icon of sin MAP16: Thirty Seconds to Earth MAP17: Yet another UAC-Like base MAP18: A Star Goats: Kill all of them MAP19: Blood factory MAP20: System Overdrive
Ep.3: Grand Final 21 22 23 24 25 26 27 28 29 30
Secret maps 31 32

This level occupies the map slot MAP20. For other maps which occupy this slot, see Category:MAP20.

MAP20: System Overdrive is the twentieth map of Blitz: Race Against Time. It was designed by Track Federal and uses the music track "Violence In Your Mind" by Sid Zetmeck, from 3 heures d'agonie 2. The par time defined in ZMAPINFO is 30 seconds.

The level is built in the style of TNT: Evilution, with the player's objective being to identify and exploit a weakness in the enemy's positioning.

Walkthrough

Map of System Overdrive

Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.

Essentials

Pick up the chaingun, megasphere, energy cell pack, and plasma rifle, then proceed to the northern section of the level. From there, head to the eastern area, where a cyberdemon jr. awaits. Behind it is a staircase leading to a switch that opens the southern section of the map, which is guarded by two Hell knights and two demons. After clearing the area, turn left and make your way to the exit, which is behind a 30-second timed door.

Secrets

There are no official secrets on this map.

Speedrunning

As this level does not contain official secrets, the NM 100S category is redundant.

Current records

The records for the map at the Doom Speed Demo Archive are:

Run	Time	Player	Date	File	Notes
UV speed
NM speed
UV max
UV -fast
UV -respawn
UV Tyson
UV pacifist

The (absence of) data was last verified in its entirety on July 2, 2025.

Statistics

Map data

Things	83
Vertices	562*
Linedefs	628
Sidedefs	961
Sectors	140

* The vertex count without the effect of node building is 499.

Things

This level contains the following numbers of things per skill level:

Single-player
Monsters	1-2	3	4-5
Zombieman	24
Heavy weapon dude	7
Imp	7
Demon	6
Revenant	3
Hell knight	2
Plasma zombie	2
Dark imp	4
Cyberdemon Jr.	1
Weapons	1-2	3	4-5
Chaingun	1
Plasma gun	1
Ammunition	1-2	3	4-5
Energy cell pack	9	9	7
Health & Armor	1-2	3	4-5
Medikit	7
Items	1-2	3	4-5
Megasphere	2	2	1

Trivia

• This level is a reference to MAP01: System Control, the first map of TNT: Evilution.
• The ending area closely resembles the final section of the original System Control map.