Tool-assisted game movies
When human skills are just not enough

Submission #6104: keylie's Linux TowerFall Ascension "all trials" in 03:25.89

Console: Linux
Game name: TowerFall Ascension
Game version: any
ROM filename: towerfall-07212016-bin
Branch: all trials
Emulator: libTAS v1.3.1
Movie length: 03:25.89
FrameCount: 205891
Re-record count: 6275
Author's real name: Clément Gallet
Author's nickname: keylie
Submitter: keylie
Submitted at: 2018-09-17 18:59:16
Text last edited at: 2018-09-23 12:15:58
Text last edited by: feos
Download: Download (8856 bytes)
Status: judging underway
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Version info:

libTAS version: 1.3.1

Annotation info:

Game: Towerfall Ascension + Dark World Expansion v1.3.2.0 DRM-free x86_64 version (taken from Humble Store: https://www.humblebundle.com/store/towerfall-ascension and https://www.humblebundle.com/store/towerfall-dark-world-expansion . Dark World Expansion DRM-free version is noted as Windows only, but works for all systems because it is just an archive of data files to be placed inside the game directory).

OS: Ubuntu 18.04 amd64 with Linux kernel 4.13.0-36-generic, libTAS v1.3.1.

Before the movie can be played, the game must be launched natively and fullscreen mode must be turned off in the options. This is needed because libTAS enforces a windowed mode, and some games like Towerfall does not display correctly if configured in fullscreen mode.

Also, the present TAS completes all 48 trials, some of which are locked on a fresh game install. To unlock them, you can edit the game config file located in "~/.local/share/TowerFall/tf_saveData" (it should be present if you modified the fullscreen option above). In lines 1512-1515 there should be four XML tags "Moonstone", "SunkenCity", "TowerForge" and "Ascension". All four values inside those tags must be changed from "false" to "true".

Inside libTAS, fill the Game executable to "/path/to/game/TowerFall.bin.x86_64", then open "File > Executable Options..." and set "Library path" to "/path/to/game/lib64".

Author's comments and explanations:
TowerFall Ascension is a multiplayer arena game first released on the Ouya by the name TowerFall in 2013, then later ported to other consoles and PC. The Dark World expansion pack was released two years later. While focusing on multiplayer, this game features a Trials mode where a single player must shoot targets. The present TAS completes all 48 trials of the game, including ones from Dark World expansion.

(Link to video)

Below the same video slowed down to 0.25x speed (and still 60 fps). Sorry for the crappy audio.

(Link to video)

Game objectives

  • Emulator used: libTAS 1.3.1
  • Completes all 48 trials
  • Aims at fastest in-game time, then fastest real-time
  • Genre: Platform, Fighting


(Most of the tricks described here are taken from http://towerfall.wikidot.com/how-to-play )


A standard ability, but very important for the following tricks. Pressing the Dodge button while ducking executes a Dodge-slide, which is an horizontal Dodge with a higher velocity than a normal Dodge.

Dodge Canceling

The base of most tricks of the game is the ability to cancel a Dodge at any point by pressing the same or another Dodge button (Hyper Dash), or by jumping if the player is on the ground (jump-cancel). When Dodging, the player starts at a high initial speed, then it decreases rapidly. When a Dodge is canceled by another Dodge, the player keeps the Dodge speed, allowing him to move faster than running speed. A Dodge can be canceled on the first frame after the Dodge for the highest speed. A cancelled dodge also enters the cooldown period earlier, allowing the player to execute another Dodge earlier.

Super Jump

A Super Jump combines a dodge-slide with a jump-cancel. The player must perform a dodge-slide immediately followed by a jump-cancel. The added momentum from the dodge-slide will propel the player forward into the air a great distance.

Hyper Jump

A Hyper Jump is a Super Jump combined with a Hyper Dash. It's executed by performing a dodge-slide, followed immediately by a Dodge cancel, and then a jump. This method gives the highest momentum boost to the player allowing for jumps of huge distances. This is the best way to gain massive speed and launch yourself across the map, since slides are faster than dodges and air friction is lower than ground friction.

Hyper Wing

If a player possesses wings they can perform a technique that sees them fly rapidly upwards into the air. It is performed by jumping with wings when airborne followed immediately by an upwards Hyper Dash.

Air Aiming

During a Hyper Jump, holding the arrow button slightly decreases the air friction, but we loose the player control when aiming in the air.

Framerate choice

Because of the Dodge cancel mechanics, the sooner you cancel the Dodge, the higher speed you gain. As a consequence, a higher framerate gives access to higher speed. The game does not lock the framerate, it depends either on your monitor refresh rate when vsync is on, or your computer processing power when vsync is off. The game engine supports high framerates without any problem. As an example, at a very high framerate (1000 fps), a Hyper Jump gives a velocity 15% higher than at 60 fps. So I decided to record this TAS at a framerate of 1000 fps. This value was chosen for multiple reasons. First, the increased velocity is negligible after around 300 fps. Also, the in-game timer is precise to the millisecond, and behaves correctly regarding frame advancing (advancing one frame always increases the timer by exactly one millisecond). This allows us to complete stages at the best precision displayed by the game.

Individual times

Stage Time
Sacred Ground I 1.151
Sacred Ground II 1.542
Sacred Ground III 1.082
Twilight Spire I 0.770
Twilight Spire II 0.812
Twilight Spire III 1.392
Backfire I 1.307
Backfire II 1.144
Backfire III 2.106
Flight I 1.375
Flight II 2.618
Flight III 2.002
Mirage I 1.180
Mirage II 1.726
Mirage III 1.678
Thornwood I 1.359
Thornwood II 1.739
Thornwood III 2.036
Frostfang Keep I 1.745
Frostfang Keep II 1.688
Frostfang Keep III 1.602
King's Court I 1.761
King's Court II 1.701
King's Court III 1.210
Sunken City I 1.392
Sunken City II 2.066
Sunken City III 1.387
Moonstone I 1.641
Moonstone II 1.648
Moonstone III 1.365
TowerForge I 0.620
TowerForge II 1.529
TowerForge III 0.762
Ascension I 2.305
Ascension II 2.227
Ascension III 1.562
The Amaranth I 1.128
The Amaranth II 1.900
The Amaranth III 1.448
Dreadwood I 1.360
Dreadwood II 1.534
Dreadwood III 2.201
Darkfang I 1.259
Darkfang II 1.382
Darkfang III 1.637
Cataclysm I 1.384
Cataclysm II 1.602
Cataclysm III 1.777
Total 1:13.842

Suggested screenshot: 135663

feos: Submissions with questionable settings need me. Judging...

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