73%Strong matchProtolife
86%43686% positive reviews, Very Positive across 436 reviews·Tower Defense · Pixel Graphics
—Totally Defenceless is a wave-based tower defence game. You will need to protect your energy cores from the invading alien bugs by strategically constructing a maze of towers to alter their path to your advantage.
Alien bugs are launching an assault on Earth, which is rather unfortunate, and the only thing standing in their way is your strategic cunning. It's time to dust off our snazzy array of scientist-approved towers, and put them to use defending against endless waves of uninvited insects that are clearly intent on destroying our energy cores! Throw in a few nifty abilities from the Laboratory, some upgrades here and there, and our survival is almost guaranteed, probably.

Mount a defence by building hundreds of towers, choosing from the wide selection available. The placement of the towers can affect the path your enemies are likely to take across the map, so you'll need to put your strategy pants on for best results.

This game contains a lot of bugs, and not only the type that the developer created with their incompetence. We're talking insects. They possess special abilities, synergize well with each other and are very angry at us for some well thought out, lore-appropriate reason.

There are times when you need a little something extra to get you out of a pickle. Luckily, there are a variety of situational abilities ready for just such an occurrence. They allow you to disrupt the alien assault for a moment, or explode something that had the audacity to survive your clearly adequate defence.

Many of the locations you fight in, as you battle your way through the campaign, have their own little thing going on that will add a bit of flavour to the otherwise completely normal experience of fighting alien bugs with plasma towers.
With permanent unlocks as you progress, new options and strategies continually become available for previous maps, improving your chances of getting those previously out-of-reach rewards, or setting that sweet high-score you've been dreaming about!
This game was created by a single developer, so it is modest in size and scope. Each map can take anywhere from 20 minutes, to multiple hours to play, depending on your talent for survival. Full completion of the game is likely to take at least 40 hours.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like Totally Defenceless are Protolife, Broken Universe - Tower Defense, Infested Planet, Desperate Place, and Defense Grid: The Awakening.
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