Sidescrolling shooters are usually known for weapons, bullet-dodging and hordes of different enemies. While Intrusion does have all these features, it adds another element to the game: ragdoll-like physics. This makes it harder to jump away and avoid being shot, but it's just so much fun to see your opponents fly around when hit. During the game you'll fight soldiers, robots, helicopters and even get to try a huge robot with a machinegun and infinite grenades.
Story of Intrusion
Your rocket lands inside of an arctic place full of enemy soldiers and exploding mechanical pigs, you have to kill some giant robots, you get hit by a train, fight on that train, shot up in the sky and shoot down lots of enemies on your way. Ya' know, just the usual plot.
Gameplay of Intrusion
As I already said there's some physics involved in this game, which, on one hand, makes things a little more exciting, but your character becomes very slow and a bit more difficult to control. It takes some practice to figure out how to move best and plan forward to balance your weaknesses. By the way, you control your nameless soldier with WASD, change weapons with 1,2,3 and 4, and aim with the mouse.
At this point I have to say something about the graphics: it keeps getting better during the whole game! Even though the first level's plain icy deserts aren't very spectacular, you'll soon see what I mean. Detailed sky and backgrounds that look like a photo, just like the whole scenery make everything look better than most flash shooters do. Also, spectacular cutscenes and big bosses prevent the game from getting boring or repetitive.
Intrusion provides a normal and an easy mode, and a list of every chapter you have played through which you're then free to choose from. All in all Intrusion is a reasonably difficult game, but never completely unfair. Some boss attacks are a little overpowered in my opinion, but that's what makes a boss fight interesting I guess. Of course there are multiple checkpoints in every level, so you don't have to start from the beginning every time you die.
Since I took more screenshots than usual and there's really not much more left to say about the gameplay, I'll end this part now with the facts that missiles can be shot, enemies have the ability to shoot and walk through crates and you can climb and swing on ropes, but you'll figure that out while playing the game anyways.
-The blaster can shoot through some platforms and multiple enemies, this is especially useful when many weak opponents attack you or when you're fighting the worm-like boss in the second level.
-You can only dodge the worm's lasers if you move close enough to his head, if you're too far away he'll easily hit you.
-You can get out of the giant robot in the fourth level by holding down and pressing jump. You should do this to collect weapons and health on the way.
-Jumping around is not always the best choice, since you can hardly control your character in the air. Try ducking or taking cover instead, keeping a low profile is sometimes the only thing you can do.
If you're looking for a challenging and good looking game, you'll probably like Intrusion. This game has it all: graphics, physics and huge robots. One of the best run n guns you'll find on the net.