Play Altered Beast: Guardian of the Realms (Game Boy Advance) Online

Console Game Boy Advance Genre Action Players
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Controls

You can change controls by clicking the game window and selecting Control Settings.

Player 1

WASD
Move Crouch Swim Fly And Modify Attacks
K
Punch
J
Kick
Space
Jump Or Super Jump
L
Jump Or Super Jump
Enter
Pause
R Shift
Unused

Emulator

Q
Fast Forward
E
Rewind
4
Slow Motion
1
Quick Save State
2
Quick Load State
3
Change State Slot
Gameplay screenshot of Altered Beast: Guardian of the Realms for Game Boy Advance

Overview and Gameplay

Altered Beast: Guardian of the Realms follows the resurrected warrior Antonius as he recovers stolen Realm Gate keys and confronts Arcanon. Fifteen side-scrolling realms contain enemy waves, hazards, hidden talismans, and boss battles. The Hall of Realms serves as a stage-selection hub, and completed areas can be replayed to find missed upgrades. Collecting Spirit Balls increases Antonius’s strength and eventually transforms him into the beast assigned to that realm.

Controls And Mechanics

Antonius can walk, crouch, jump, perform uppercuts, and use standing or low punches and kicks. Ten principal transformations include werewolf, dragon, shark, rhinoceros, scorpion, eagle, and Chimera forms, each with different attacks or movement abilities. Hidden talismans unlock enhanced versions of these beasts. Breakable objects and defeated enemies can reveal extra lives, continues, temporary magic effects, and transformation upgrades. Game Link support enables a simultaneous two-player cooperative campaign and a competitive Brawl Mode for up to four participants, with one cartridge required for each system.

Release And Credits

  • Release year: 2002
  • Developer: 3d6 Games
  • Publisher: THQ
  • Original platform: Game Boy Advance
Version
altered-beast-guardian-of-the-realms-usa.gba
Status
Playable in browser
Updated
October 13, 2026

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