Space1.io is an insanely cool and unique .io game. This game takes place in outer-space, and is essentially a massive battle between players who control a "fleet" or "army" of neon triangles. When you shoot, each of them fires a lazer-beam starwars-like bullet!
When you hit other players with your bullets, you destroy them, and gain your own neon-triangle minions! This makes for some seriously cool action-packed fights with other players.
A good strategy in space1.io is to try to attack your enemies from behind when they are not expecting it. This makes it tough for them to respond quick enough to defeat you. Generally, the player who shoots first tends to win in an even battle... Use that to your advantage!