.SL21

.SL21 file extension

This is the basic program to work with .SL21 extension

HLSW

HLSW

HLSW is entirely free, is very similar to “The All-Seeing Eye”, but very friendly. It allows you to manage servers from different multiplayer games. A few games listed are: Call of Duty (including the version World at War), Half-life, Halo, Medal of Honor, Quake, and others... (more)

The program works with the following extensions: sl03, sl20, sl05, sl21, sl06, sl23, sl24, sl07, sl25, sl08, sl26, sl09, sl27, sl10, sl28, sl11, sl29, sl12, sslf, sl13, sl30, sl14, sl15, sl16, sl00, sl17, sl01, sl18, sl02 and sl19

.SL21 extension is also supported by the following program:

Adobe Photoshop

Adobe Photoshop

Adobe Photoshop delivers more imaging magic, stunning creative options and more.