Klaus Lee - Thunderballs for Windows

Klaus Lee – Thunderballs by NUKKLEAR is an action game that resembles old video games from the 80s, but it's much more over-the-top and humorous. You play as Klaus Lee, a show-off action hero who can fly, shoot lasers, and blow things up. You can explore caves full of dangers like traps, bad guys, and brain-teasing puzzles. 

Klaus Lee – Thunderballs spans over 100 handcrafted levels and includes a level editor with Steam Workshop integration, allowing for endless player-generated content. This adventure for Klaus features puzzles, moving dangers, and jetpack exploration — all presented with bold visuals and humorous storytelling.

Action, traps, and creation tools

Jetpack movement defines Klaus Lee – Thunderballs' traversal, mixing vertical freedom with constant fuel management, though fuel constraints can feel restrictive. Dynamite can blow away obstacles, while laser eyes serve as a directional tool for activating devices or eliminating threats. Levels demand precise timing, careful fuel management, and spatial planning. You can switch tools even in cramped areas, due to responsive controls that make dodging dangers and interacting with objects easy.

Each level is a dense zone packed with obstacles like crumbling floors, spirit chasers, timed gates, and movable stones. Several puzzles challenge your logic rather than reflexes, incorporating levers, trigger plates, and memory-based mechanics. Klaus must deal with temple guardians, cursed walls, and mazes that shift over time. Despite the bombastic tone, the game leans into environmental awareness and pattern recognition as core skills for progression.

It features a powerful level editor that allows you to place enemies, traps, puzzles, and terrain freely. Share your creations directly via Steam Workshop, making it easy to access and rate maps from others. The level editor supports cross-platform publishing and maintains the game's core rules, letting you experiment with fuel limits, trap design, and logic puzzles. This greatly expands the game beyond its included levels.

Fly, solve, create

Klaus Lee – Thunderballs sticks to its 2D action-platformer roots while layering in a mix of puzzle mechanics and level-building functionality. The exaggerated character narrative supports a fast-moving game loop built around tool switching and trap evasion. It offers extended playtime through diverse levels and Steam Workshop integration. It's a focused adventure, delivering jetpack physics, environmental puzzles, and absurd backstory flair without excess.

• Released version