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UFO: Aftershock is a computer real-time tactical strategy game created by Altar and released in 2005. It is a squad combat game at its core with overlying strategic elements and a clear debt to the lauded classic X-COM: UFO Defense (1994), though a smaller one than that of its predecessor, UFO: Aftermath.

UFO: Aftermath, is a 2003 real-time strategy game with real-time tactical battles from ALTAR Interactive, being a homage to the X-COM series of games. It started as The Dreamland Chronicles: Freedom Ridge, an abortive project by the Mythos Games, original developers of the X-COM series. In 2002 the unfinished game has been bought by ALTAR and restarted.

Deadly Games is a DOS sequel to the original game. It features a different format, however, and is considered by some to be more of a spin-off than a sequel. This game features the same engine and top-down perspective as the original game.

Serious Sam: The Random Encounter is Vlambeer's take on the traditional JRPG . Admittedly, we don't have a clue about JRPGs. Seems like we ended up with a game about running backwards and shooting hundreds of enemies in the face with heavy weaponry. Explosions.

Co-created with William Stiernberg, Cthulhu Saves the World was released on December 30, 2010. Cthulhu, the squid-faced, winged god created by H. P. Lovecraft emerges from the sea after centuries of slumber only to find his dark powers immediately sealed away by a mysterious holy wizard. A narrator then informs the player that the only way to break the curse is to become a true hero. Quickly breaking the fourth wall, Cthulhu informs the narrator that he was eavesdropping and now knows how to break the curse.

Co-created with William Stiernberg, Breath of Death VII: The Beginning was released on April 22, 2010.

Azriel Odin, ex-assassin, arrives on the rain-drenched planet of Barracus. When things go horribly wrong, he can only seek help from the very criminals he used to work for. Meanwhile, across the galaxy, a man called Delta-Six wakes up in a hospital with no memory. Without knowing where to turn or who to trust, he vows to escape before he loses his identity completely. As fate brings these two closer together, we discover a world where life is cheap, identities are bought and sold, and a quest for redemption can change the fate of a whole galaxy.