Thing-Thing Arena Pro is a Flash-based run-and-gun side-scroller developed by Diseased Productions and released on July 2, 2013, as the eighth installment in the Thing-Thing series and the fourth in the Arena subseries. Unlike earlier entries, it adopts an objective-based structure: players must complete nine unique challenges per level—ranging from achieving high Operator scores to collecting briefcase parts—within a single life and time limit. Weapon and map unlocks are gated behind these objectives, encouraging replay and mastery of each maze-like arena. A global leaderboard lets you compare high scores, while infinite ammo and automatic reloads keep the action nonstop.
Thing-Thing Arena Pro’s core loop is fast-paced combat within confined, labyrinthine arenas. You start with two selectable weapons and an infinite-ammo pool, then blast through hordes of AI enemies to rack up combos and score multipliers. Each level ends when your character dies or the time expires—but only by completing all nine objectives can you unlock the next stage.
Controls:
WASD: Move Around
Mouse: Aim / Shoot
Shift: Run
E: Switch Weapons
R: Reload
P: Pause Game
M: Toggle Map