.ASS File Extension
File Type 1Aegisub Advanced Substation Alpha File
What is an ASS file?
Subtitles file created by Aegisub, a cross-platform video typesetting application; stores the subtitle text formatted using the Advanced Substation Alpha syntax; used for storing edited movie subtitles.
ASS files include text styles, white space, text orientation, and other settings. They also store the sequencing and timing for when the text is displayed during the video.
File Type 2Splinter Cell Blacklist Game Data File
.ASS File Association 2
Compressed data file created for Splinter Cell Blacklist, a third-person action-adventure stealth game; holds map layout data referenced by the game for each level in Splinter Cell; often accompanied by .ASSTRM files; not meant to be opened.
NOTE: Much like ASS files, .UMD files contain Splinter Cell gameplay data as well.