SIK is an intense shooter where you face increasing waves of aggressive aliens. The first enemies are easy enough to deal with but it's important to upgrade your weapon before the eye beam shooting pazuzu aliens show up. There are a few neat mechanics like unlocking new areas to access items and entering houses to avoid the swarms, but aside from a few safe places you can climb to avoid ground dwellers outside your temporary reprieve will usually come at a cost of incremental damage. Different weapons affect movement speed and how fast you can kill enemies; the strongest gun may come at the cost of slower strafing to avoid the aforementioned eye beams. Mixing weapon types in multiplayer helps control the onslaught, Steam only mentions LAN but it's possible to play online with an ip address. Highly recommended, even though I died a lot.

It's fast

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Amazing visual art
I love multiplayer games to play with my friends.
This is a multiplayer shooter game with a really good vibe where I can play with my friends and it's not just shooting but we can have paths to unlock and we can have strategy.
Shut up and take my money