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Multiplayer Maps
Mexican Mission: Available by Default
Ice Station: Available by Default
Hospital: Available by Default
Training Ground: Available by Default
Aztec: Available by Default
Scrapyard: Clear Arcade League - Amateur League - Mode Madness - Scrap Medal with a Bronze Medal or higher
Nightclub: Clear Arcade League - Amateur League - Too Hot to Handle - Disco Inferno with a Broze Medal or higher
Hangar: Clear Arcade League - Amateur League - Beginner's Series - Top Shot with a Bronze Medal or higher
Robot Factory: Clear Arcade League - Amateur League - It's a Blast - Demolition Derby with a Bronze Medal or higher
Ufopia: Clear Arcade League - Honorary League - Maximus - Cold Corpse Caper with a Bronze Medal or higher
Chinese: Clear Arcade League - Honorary Leauge - Elimination Series - Starship Whoopers with a Bronze Medal or higher
Chasm: Clear Arcade League - Honorary League - Outnumbered but Never Outpunned - Can't Handle This with a Bronze Madal or Higher
Streets: Clear Spaceship: 2401 on the Easy difficulty setting
Compund: Clear Spaceship: 2401 on the Normal difficulty setting
Site: Unknown, Probably linked to amount of Arcade League matches or Challenges completed
Circus: Clear Challenge - Monkeying Around - Dam Bursters with a Bronze Medal or higher
Secret
In the 1990 Siberia level, on a shelf inside the main facility on the western side of the dam, a game cartridge labelled ''Anaconda'' can be found.
By selecting the Temporal Uplink and pressing the reload button, you can play the game on the cartridge, which is loosely based around Snake, found on most Nokia cell-phones.
***Note: press left and right to ''steer'' your snake, and press the action button to give it a speed boost.
Secret AstroLander Game
When playing on the Normal or Hard difficulty settings, another cartridge can be found on the 2019 NeoTokyo level, inside the locker room in the research facility. (It's in the locker on the left).
By selecting the Temporal Uplink and pressing the reload button, you can play the game on the cartridge, which is based upon Lunar Lander, a classic Atari coin-op game.
Secret RetroRacer Game
When playing on the Hard difficulty setting only, a final cartridge can be found on the 2315 Robot Factory level, in the huge bunker with armor placed beneath one of the ramps. Underneath the other ramp is the RetroRacer cartridge.
By selecting the Temporal Uplink and pressing the reload button, you can play the game on the cartridge, which is a top-down racer, similar to Micro Machines or Sprint 2.