I cannot progress further from "Into the Maelstrom", I'm getting a crash to desktop without warnings or anything.
Just run the mission with debug, attaching the file and here's a resume:
==========================================================================
DEBUG SPEW: No debug_filter.cfg found, so only general, error, and warning
categories can be shown and no debug_filter.cfg info will be saved.
==========================================================================
FreeSpace 2 Open version: 3.7.1
Passed cmdline options:
-spec_exp 90
-ogl_spec 10
-spec_static 1
-spec_point 0.2
-spec_tube 0.6
-ambient_factor 60
-missile_lighting
-nomotiondebris
-3dshockwave
-soft_particles
-post_process
-bloom_intensity 70
-fxaa
-fxaa_preset 5
-fb_explosions
-orbradar
-3dwarp
-ship_choice_3d
-weapon_choice_3d
-warp_flash
-snd_preload
-mod mediavps_2014_beta
Building file index...
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\0_MV_Beta.vp' with a checksum of 0xcce6b7cb
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_A-Glows.vp' with a checksum of 0xb71153f6
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Advanced.vp' with a checksum of 0xc4ec4c72
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Assets.vp' with a checksum of 0xa439fef3
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_CB_ANI_1.vp' with a checksum of 0x6788e102
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_CB_ANI_2.vp' with a checksum of 0xf9fefcbb
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Effects.vp' with a checksum of 0x1ced67fa
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Music.vp' with a checksum of 0xa37a4e9c
Found root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Root.vp' with a checksum of 0xab1b6f5d
Found root pack 'C:\Games\FreeSpace2\multi-mission-pack.vp' with a checksum of 0x377695e0
Found root pack 'C:\Games\FreeSpace2\multi-voice-pack.vp' with a checksum of 0xd50e7442
Found root pack 'C:\Games\FreeSpace2\Root_fs2.vp' with a checksum of 0xce10d76c
Found root pack 'C:\Games\FreeSpace2\smarty_fs2.vp' with a checksum of 0xddeb3b1e
Found root pack 'C:\Games\FreeSpace2\sparky_fs2.vp' with a checksum of 0x164fe65a
Found root pack 'C:\Games\FreeSpace2\sparky_hi_fs2.vp' with a checksum of 0xa11d56f1
Found root pack 'C:\Games\FreeSpace2\stu_fs2.vp' with a checksum of 0xd77da83a
Found root pack 'C:\Games\FreeSpace2\tango1_fs2.vp' with a checksum of 0x4c25221e
Found root pack 'C:\Games\FreeSpace2\tango2_fs2.vp' with a checksum of 0x86920b82
Found root pack 'C:\Games\FreeSpace2\tango3_fs2.vp' with a checksum of 0x705e8d71
Found root pack 'C:\Games\FreeSpace2\warble_fs2.vp' with a checksum of 0xd85c305d
Searching root 'C:\Games\FreeSpace2\mediavps_2014_beta\' ... 2 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\0_MV_Beta.vp' ... 516 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_A-Glows.vp' ... 1735 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Advanced.vp' ... 1601 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Assets.vp' ... 1742 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_CB_ANI_1.vp' ... 32 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_CB_ANI_2.vp' ... 57 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Effects.vp' ... 2043 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Music.vp' ... 32 files
Searching root pack 'C:\Games\FreeSpace2\mediavps_2014_beta\MV_Root.vp' ... 734 files
Searching root 'C:\Games\FreeSpace2\' ... 9 files
Searching root pack 'C:\Games\FreeSpace2\multi-mission-pack.vp' ... 110 files
Searching root pack 'C:\Games\FreeSpace2\multi-voice-pack.vp' ... 307 files
Searching root pack 'C:\Games\FreeSpace2\Root_fs2.vp' ... 157 files
Searching root pack 'C:\Games\FreeSpace2\smarty_fs2.vp' ... 10 files
Searching root pack 'C:\Games\FreeSpace2\sparky_fs2.vp' ... 3027 files
Searching root pack 'C:\Games\FreeSpace2\sparky_hi_fs2.vp' ... 1337 files
Searching root pack 'C:\Games\FreeSpace2\stu_fs2.vp' ... 2355 files
Searching root pack 'C:\Games\FreeSpace2\tango1_fs2.vp' ... 32 files
Searching root pack 'C:\Games\FreeSpace2\tango2_fs2.vp' ... 15 files
Searching root pack 'C:\Games\FreeSpace2\tango3_fs2.vp' ... 10 files
Searching root pack 'C:\Games\FreeSpace2\warble_fs2.vp' ... 52 files
Found 22 roots and 15915 files.
ERROR: Unknown Language Checksum: 589986744
Using default language settings...
TBM => Starting parse of 'mv_root-lcl.tbm' ...
Setting language to English
TBM => Starting parse of 'mv_root-lcl.tbm' ...
Going to debriefing!
Got event GS_EVENT_DEBRIEF (33) in state GS_STATE_GAME_PLAY (2)
SOUND: c:\code\fs2_open_0\code\sound\ds.cpp:1268 - OpenAL error = 'Invalid Operation'
Unloading in mission messages
Storing stats now
It says a sound is missing, but I'm sure I downloaded everything.
[attachment deleted by an evil time traveler]