Underplayed Gems

Klaus Lee - Thunderballs (2025)

Klaus Lee - Thunderballs cover
Developer
NUKKLEAR
Publisher
Assemble Entertainment
Platforms
Windows
Genres
Action, Adventure, Casual
Rating
4.6 of 5, 12 player ratings
Typical playtime
about 2.0 hours
Where to get it
Steam

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The 3D catalog: game boxes on wooden shelves, with the cat sitting at the counter next to its greeting.

The catalog in 3D

The same catalog has a room you can walk around in. The cat behind the counter is the AI Catbot, and they pick real games from it when you tell them what you feel like playing. Nothing is for sale, here or in there. Go in from here and this game is already out on the counter, with more like it waiting on the shelf next to it.

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How it feels

A fast-paced and playful action-adventure game with a lighthearted, arcade feel.

actionadventurecasuallightheartedarcade-likeplayfulenergetic

What players say

Players say it is a well-made throwback to classic platformers like H.E.R.O. and Dangerous Dave, with tight jetpack-based movement and a one-hit-death system. The level editor gets frequent praise. Players split on how punishing the instant-death traps feel, with some calling it satisfyingly hard and others finding it frustrating.

Screenshots

Klaus Lee - Thunderballs screenshot 1Klaus Lee - Thunderballs screenshot 2Klaus Lee - Thunderballs screenshot 3Klaus Lee - Thunderballs screenshot 4Klaus Lee - Thunderballs screenshot 5

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This page is from Underplayed Gems, a catalog of older and overlooked games. Not quite it? You can browse by platform and genre, or take this one into the 3D catalog and ask the Catbot for something closer.