"Action All-Stars" Has No Unlockable Arcade Mode (It's a Compilation)
Action All-Stars (2011, Wii) is a compilation of 16 classic arcade games (Centipede, Asteroids, Missile Command, etc.). It does not contain a separate "arcade mode" to unlock.
What the Game Actually Includes
16 Atari/Classic Arcade Titles: Playable directly from main menu.
Challenge Modes: Specific objectives per game (score targets, survival).
Multiplayer: Local co-op/competitive for supported titles.
No Meta-Progression: No currency, no unlockable arcade cabinet, no "arcade within the game."
Possible Confusion Sources
Atari Greatest Hits / Atari Flashback Classics: Similar compilations with "museum" modes.