| Extension | File Description |
| .XMT_TXT | Uncommon Files |
| .XMT_TXTQUO | 3D Image Files |
| .XMU | Uncommon Files |
| .XMV | Uncommon Files |
| .XMW | Uncommon Files |
| .XMX | Uncommon Files |
| .XMXP | Uncommon Files |
| .XMY | Uncommon Files |
| .XMZ | Audio Files |
| .XN0 | Uncommon Files |
| .XN1 | Uncommon Files |
| .XN2 | Uncommon Files |
| .XN3 | Uncommon Files |
| .XN4 | Uncommon Files |
| .XN5 | Uncommon Files |
| .XN6 | Uncommon Files |
| .XN7 | Uncommon Files |
| .XN8 | Uncommon Files |
| .XN9 | Uncommon Files |
| .XNA | Uncommon Files |
| .XNB | Game Files |
| .XNC | Uncommon Files |
| .XND | Uncommon Files |
| .XNE | Uncommon Files |
| .XNF | Uncommon Files |
| .XNG | Uncommon Files |
| .XNH | Uncommon Files |
| .XNI | Uncommon Files |
| .XNJ | Uncommon Files |
| .XNK | Misc Files |
| .XNL | Uncommon Files |
| .XNM | Uncommon Files |
| .XNML | Uncommon Files |
| .XNN | Uncommon Files |
| .XNO | Uncommon Files |
| .XNP | Uncommon Files |
| .XNQ | Uncommon Files |
| .XNR | Uncommon Files |
| .XNS | Uncommon Files |
| .XNT | Plugin Files |
| .XNU | Uncommon Files |
| .XNV | Uncommon Files |
| .XNW | Uncommon Files |
| .XNX | Uncommon Files |
| .XNY | Uncommon Files |
| .XNZ | Uncommon Files |
| .XO | Data Files |
| .XO0 | Uncommon Files |
| .XO1 | Uncommon Files |
| .XO2 | Uncommon Files |
| .XO3 | Uncommon Files |
| .XO4 | Uncommon Files |
| .XO5 | Uncommon Files |
| .XO6 | Uncommon Files |
| .XO7 | Uncommon Files |
| .XO8 | Uncommon Files |
| .XO9 | Uncommon Files |
| .XOA | Uncommon Files |
| .XOB | Uncommon Files |
| .XOC | Uncommon Files |
| .XOD | Uncommon Files |
| .XOE | Uncommon Files |
| .XOF | 3D Image Files |
| .XOG | Uncommon Files |
| .XOH | Uncommon Files |
| .XOI | Uncommon Files |
| .XOJ | Uncommon Files |
| .XOK | Uncommon Files |
| .XOL | Uncommon Files |
| .XOM | Game Files |
| .XON | Uncommon Files |
| .XOO | Uncommon Files |
| .XOP | Plugin Files |
| .XOQ | Uncommon Files |
| .XOR | Uncommon Files |
| Extension | File Description |
| .XOS | Uncommon Files |
| .XOT | Uncommon Files |
| .XOU | Uncommon Files |
| .XOV | Uncommon Files |
| .XOW | Uncommon Files |
| .XOX | Uncommon Files |
| .XOY | Uncommon Files |
| .XOZ | Uncommon Files |
| .XP | Audio Files |
| .XP0 | Uncommon Files |
| .XP1 | Uncommon Files |
| .XP2 | Uncommon Files |
| .XP3 | Game Files |
| .XP4 | Uncommon Files |
| .XP5 | Uncommon Files |
| .XP6 | Uncommon Files |
| .XP7 | Uncommon Files |
| .XP8 | Uncommon Files |
| .XP9 | Uncommon Files |
| .XPA | Uncommon Files |
| .XPADDERCON | Settings Files |
| .XPB | Uncommon Files |
| .XPC | Uncommon Files |
| .XPD | Web Files |
| .XPE | Uncommon Files |
| .XPF | Uncommon Files |
| .XPG | Uncommon Files |
| .XPH | Uncommon Files |
| .XPI | Plugin Files |
| .XPIX | Uncommon Files |
| .XPJ | Data Files |
| .XPK | Game Files |
| .XPL | Settings Files |
| .XPM | Data Files |
| .XPN | Uncommon Files |
| .XPO | Uncommon Files |
| .XPP | Developer Files |
| .XPQ | Uncommon Files |
| .XPR | Data Files |
| .XPS | Page Layout Files |
| .XPT | Plugin Files |
| .XPTHEME | Uncommon Files |
| .XPTOC | Uncommon Files |
| .XPU | Uncommon Files |
| .XPV | Uncommon Files |
| .XPW | Uncommon Files |
| .XPX | Uncommon Files |
| .XPY | Uncommon Files |
| .XPZ | Uncommon Files |
| .XQ0 | Uncommon Files |
| .XQ1 | Uncommon Files |
| .XQ2 | Uncommon Files |
| .XQ3 | Uncommon Files |
| .XQ4 | Uncommon Files |
| .XQ5 | Uncommon Files |
| .XQ6 | Uncommon Files |
| .XQ7 | Uncommon Files |
| .XQ8 | Uncommon Files |
| .XQ9 | Uncommon Files |
| .XQA | Uncommon Files |
| .XQB | Uncommon Files |
| .XQC | Uncommon Files |
| .XQD | Uncommon Files |
| .XQE | Uncommon Files |
| .XQF | Uncommon Files |
| .XQG | Uncommon Files |
| .XQH | Uncommon Files |
| .XQI | Uncommon Files |
| .XQJ | Uncommon Files |
| .XQK | Uncommon Files |
| .XQL | Developer Files |
| .XQM | Uncommon Files |
| .XQN | Uncommon Files |
| .XQO | Uncommon Files |
| .XQP | Uncommon Files |
