IGN's Michael Zenke writes:
"Even in pre-alpha state, Space Siege is already exactly what you'd expect. Instead of a hard-jawed warrior wading through waste-deep goblin blood with sword clenched, the protagonist is a hard-jawed space marine wading through waste-deep alien blood with a big gun clenched in his hands. There isn't a lot of game to actually play on the CES show floor, but what there is reminds us of how much fun it is to mindlessly click creatures to death. Despite the similar-sounding nature of the game, there were actually a number of changes to the formula on display; enough that we think some folks are going to be surprised."