It was an old game, around 2006 – 2012 maybe, if I'm not mistaken, they had two teams, or 4 colors, and the graphics were extremely simple, it was a very fun FPS, you collected points maybe collecting orbs, and built your tower with those points, so the other orbs came to attack your tower, I think it came with a version of win 7 maybe, the name maybe was last stand, but because it's a generic name I can't find anything when I search, if you've played this game please leave the name below, thanks!
Source: https://www.reddit.com/r/oldgames/comments/tdalp6/does_anyone_know_the_name_of_this_game/