As of OFP version 1.85, here's a list of all the officially supplied OFP addons files that should be retained in OFP's ADDONS subdirectory:
| 6G30.PBO | |
| ABOX.PBO | |
| APAC.PBO | |
| BISCamel.pbo | Sopwith Camel (optional) |
| BIZON.PBO | |
| BMP2.PBO | |
| BRMD.PBO | |
| CH47.PBO | |
| FLAGS.PBO | |
| G36A.PBO | |
| HUMR.PBO | |
| HUNTER.PBO | |
| KOLO.PBO | OFP: Resistance patch 1.85 |
| KOZL.PBO | |
| LASERGUIDED.PBO | |
| M2A2.PBO | |
| MINI.PBO | OFP: Resistance patch 1.85 |
| MM-1.PBO | |
| NOE.PBO | OFP: Resistance |
| O_WP.PBO | OFP: Resistance patch 1.85 |
| O.PBO | OFP: Resistance |
| O_WP.PBO | OFP: Resistance |
| OH58.PBO | |
| STEYR.PBO | |
| SU25.PBO | |
| TRAB.PBO | |
| VOICERH.PBO | Red Hammer |
| VULCAN.PBO | |
| XMS.PBO |