All available download files have been compared, checked, and merged. This means all previous fixes have been identified individually and added to this version.
Upon investigation it seemed there was not much fixing done. So the files were reverted to the very first versions available, and fixing was done upon them instead of using the latest files in an attempt to preserve file purity.

General fixes:

• Disabled changelevel entities to previous maps
• Removed single player landmark entities
• Re-added missing files
• Removed default files in custom folder ("ambient/mechwhine.wav" and "ambient/techamb1.wav") and replaced them with the actual default file paths "ambience/mechwhine.wav" and "ambience/techamb1.wav"
• Cleaned up bloat text from worldspawn entities
• Changed unused netnames into displaynames
• Changed monstermakers into squadmakers
• Added more spawn points in all maps

tower1:

• "Levelchange" game_text in tower1 was turned into elevator music
• tower1 changelevel was fixed from trigger_multiple to trigger_once and the trigger_changelevel was given the "use only" flag to prevent any further bugs
• Added parachute effects for the first spawn using sounds and item_inventory. This will work for only 8 players max at a time

tower2:

• Made the random floating changelevel to tower3 at map start into a func_illusionary so it doesn't get triggered ever again
• tower2 had issues with the custom files being played all at once for some strange reason. "sentences/c2a4_0.wav" and "sentences/t5.wav" were turned into env_sentence entities, saving file size, and were also triggered accordingly so they did not play all at once.
• Fixed changelevel in tower2. Removed default sound from custom folder "weapon/explode4.wav" and turned it into an env_explosion. Moved "weapon/mine_charge.wav" to "tower/mine_charge.wav" and made the effect as if the grunts are breaching from the elevators right before map changes
• "Elevator Music" game_text in tower2 was replaced with real elevator music (music is a default file, so credits go to the sven dev team)
• Made the global ambience sound industrial1.wav not global anymore
• Some squadmakers were spawning lots of grunts out of nowhere by the hundreds. To preserve the intention they weren't moved, but the amount of grunts spawned was reduced to 2, and a lot of grunt_repels were added nearby to divert the players attention from the uglyness of grunts spawning from thin air

tower3:

• Made changelevel "use only" as intended (reported by cryptearth)
• Fixed the delay until the changelevel by adding a trigger_relay (reported by cryptearth)
• Fixed the "train departure in 10 seconds!" game_text being triggered at map start by changing its targetname and the trigger_once target (reported by cryptearth)
• Made the random floating changelevel to tower4 at map start into a func_illusionary so it doesn't get triggered ever again (reported by kalo22)

tower4:

• (Added this fix from previous versions) Players were left with no spawn points during the new spawn zone event. Removed -"target" "spawn2"- from the trigger_respawn in tower4 that was deactivating all spawns. Also, fixed a bit the spawn activation logic (reported by kalo22) (credits for the fix to BlueSpark)
• Fixed changelevel on tower4 to tower5 so players cannot exploit it by jumping. Now the changelevel can be triggered only a short time after the submarine is in place.

tower5:

• Changed trigger_multiple to trigger_once in tower5 first door
• Disabled a floating trigger_once in tower5 that ended the map too soon

• Changed map names back to original names and reflected these changes in _motd, .cfg and .res files (maps no longer have mismatch errors due to different names)

• Changed map names back to original names and reflected these changes in _motd, .cfg and .res files (maps no longer have mismatch errors due to different names)

• Attempted to bugfix and update to Sven Coop v5.0
• Fixed spawn points triggering wrong softlocking the map
• Removed changelevels to previous maps that made no sense

• Compatibility entity fixes to update the map to Sven Coop v4.8
• Changed map names (why!?)

• Unknown fixes

• Initial release