GLaDOS, the menacing AI from Valve’s awesome Portal franchise, guest stars and shakes up the Defense Grid world. Players will battle not only alien hordes, but the deviousness of GLaDOS as she tests the player’s skills and changes all of the rules that you have come to know. Can you protect the cores in spite of her intrusive testing?

Profile page not found

The profile page you are attempting to view (official) is invalid. Please click any of the tabs to browse through this games profile.

Continue browsing the game list, to find the profile you are after.

You may also like
Brink of Extinction

Brink of Extinction

Tower Defense

Brink of Extinction is a challenging tower defense game set in the ruins of human civilization. Battle swarms of insects over 15 campaign levels and 6...

Slime City

Slime City

Tower Defense

Slime City puts you in the commander chair in a battle for survival against killer slime. You'll build cities and defend them as you reestablish a civilization...

Space Raiders in Space

Space Raiders in Space

Tower Defense

Space Raiders in Space is a wave defense roguelike based around 5 orders: Attack, Defend, Cower, Search, and Build. Command your almost competent crew...

Counter-Strike: Global Offensive

Counter-Strike: Global Offensive

First Person Shooter

Counter-Strike: Global Offensive (CS: GO) will expand upon the team-based action gameplay that it pioneered when it was launched 12 years ago.

"Beware Planet Earth!"

"Beware Planet Earth!"

Tower Defense

Heed the warning from the red planet, Earthlings! The Martians are about to strike our beloved planet to take our single most valuable resource: cows...

Def

Def

Tower Defense

Def: tower defense devolved. With pheromones ! Def is a unique 'minimalist' tower defense/RTS hybrid with interactive fiction story elements.

Shadow Struggles

Shadow Struggles

Tower Defense

A Tower Defense-like strategy game featuring an imaginative use of a card system and interactive storytelling. Which side will you choose in the battle...

Nuke the Bots

Nuke the Bots

Tower Defense

Fun and challenging action/strategy game that pits your wits and resources against an army of attacking alien bots. Fight through 30 levels on land, sea...

The Utans

The Utans

Tower Defense

'the Utans' is a tower defense game, set in an alien planet called 'Mavas'. It's intelligent inhabitant called the 'Utans' live peacefully and able to...

Space Nomads

Space Nomads

Tower Defense

- Play in a randomly generated world - Cooperative multi-player gameplay - Be creative and build your own base - Explore different environments - Collect...

Sentinels

Sentinels

Tower Defense

An exciting TD/FPS hybrid - all the strategy of tower defense, with the fun of shooting enemies down yourself!

Iron Brigade

Iron Brigade

Tower Defense

Join The Mobile Trench Brigade and protect humanity from the evil Monovision menace in this Tower Defense Shooter from Tim Schafer's Double Fine Productions...