Star Fox: Assault - Survivor Mode

Rocket Launcher:
To unlock the rocket launcher in multiplayer play 5 multiplayer matches.

Xevious Bonus Game:
Get every silver medal in story mode to unlock Xevious in Star Fox: Assault.

Demon Snipers vs Mode:
Collect all 50 flags in 1 player mode.

Secret multi-player levels:
Successfully complete the named level to unlock the corresponding level:

MULTI-PLAYER LEVEL TO COMPLETE
Aparoid City Aparoid Homeworld: Breaching the Defenses
Corneria City Corneria: War Comes Home
Fichina Fichina: Into the Storm
Inner Sargasso Hideout Sargasso Space Zone: Hostilities Revisited
Katina Outpost Katina: Frontier Base Battle
Outer Sargasso Hideout Sargasso Space Zone: Hostilities Revisited
Planet Sauria Sauria: Reunion
Space Station Orbital Gate: Incoming

Unlockable List:
Play a certain number of multiplayer matches to unlock these items:
5 matches: Missile Launcher
10 matches: Missile Launcher only mode
15 matches: Peppy Hare as Playable
20 matches: Gattling Guns
30 matches: Crown Capture Mode
40 matches: Titania Desert Stage
50 matches: Sure-Shot Scuffle mode
60 matches: Simple Map 4
75 matches: Fire burst Pods
90 matches: Booster Packs
110 matches: Booster Packs Brawl mode
130 matches: Zones Sea Base stage
150 matches: Wolfen
170 matches: Predator Rockets
200 matches: Cluster Bombs
230 matches: Booster Pack and Launcher Tilt Mode
260 matches: Stage: Simple Map 5

101: Multiplayer Respawn Equipment
Various characters respawn with different power-ups in multiplayer. Krystal gets two layers of shields after re-entering the match. Slippy respawns with a faster blaster charge 2x. Peppy respawns with a faster blaster charge 4x.

Multiplayer Stages:
Complete these levels once to unlock multiplayer stages:

Planet Sauria: Beat Sauria: Reunion
Fichina: Beat Fichina: Into the Storm
Outer Sargasso Hideout: Beat Sargasso Space Zone: Hostilities Revisited
Katina Outpost: Beat Katina: Frontier Base Battle
Inner Sargasso Hideout: Beat Sargasso Space Zone: Hostilities Revisited
Space Station: Beat Orbital Gate: Incoming
Corneria City: Beat Corneria: War Comes Home
Aparoid City: Beat Aparoid Homeworld: Breaching the Defenses

Wolf O'Donnell for Multiplayer:
To unlock Wolf O'Donnell for multiplayer, collect every Friendship medal for a certain difficulty Bronze is obviously the easiest. A friendship medal is not letting a team mate die.