Publisher Ubisoft has pledged to issue a number of key fixes to Assassin's Creed Unity following the game's calamitous launch.

Since its release across North America on Tuesday, a growing number of players have begun to document the extent of bugs and glitches that lace the game's code. (The following gallery of images show the extent of the problems, as documented the Steam user "Retro_Apocalypse".)

The known errors listed so far have become the subject of mockery, with videos showing floating characters, missing faces, random hair physics, crazed animations, and the game's main protagonist walking on air and falling through the earth.

It is not clear how the bug-ridden build passed through Ubisoft's internal QA department, nor how it managed to be certified by both Sony and Microsoft. On Thursday, Ubisoft acknowledged the extent of the problems, and on its blog listed the next batch of errors it hopes to overcome with a single patch.

It wrote that the errors given priority for a fix include:

• Arno falling through the ground.
• Game crashing when joining a co-op session.
• Arno getting caught inside of hay carts.
• Delay in reaching the main menu screen at game start.

On Wednesday, shares in Ubisoft fell 8.3 percent as investors begin to lose faith in the publisher's capacity to deliver complete games on launch day. On Twitter, the corporation has been inundated with complaints and questions about how to overcome certain bugs.

Following the release of its first main patch, Ubisoft said it is planning to roll out a number of additional updates that will address other widely reported problems, such as:

• Frame rate issues.
• Graphical and collision issues.
• Matchmaking co-op issues.
• Helix Credits issues.

The publisher has separately acknowledged a problem with the game running on PC with certain AMD CPU and GPU configurations. IT also says it's working on a fix for that.