Intrusion 2 is a 2D action platformer developed in Flash similar to ''{{VideoGame/Contra}}'' and ''VideoGame/MetalSlug''. It was made by Aleksey Abramenko, an independent Russian game developer and was released in 2012 for PC. The game is a sequel to Intrusion, a free online flash game.

In it you play as a unnamed soldier with a red scarf who must infiltrate a hostile military corporation on a reserve planet conducting forbidden weapons research. The gameplay is based around using a variety of weapons to kill enemy soldiers and robots with the option to ride several mounts and mech suits.The game is also notable for its physics engine allowing one to use their environment to their advantage.

The game and a demo can be found at or on UsefulNotes/{{Steam}}.

!! The Intrusion series contains examples of
* AdvancingBossOfDoom: Grabber, when you damage it's boosters. Eventually they snap off, but it keeps crawling. M.A.C.E.'s first phase counts as well.
* BackgroundBoss: M.A.C.E. will jump into the background and sweep the area with a laser while firing a MacrossMissileMassacre in between.
* BottomlessMagazines: So long as you have ammo weapons can be fired indefinitely, with the exception of the grenade launcher which automatically reloads after each shot.
* {{BFG}}: The gun wielded by a certain type of MiniMecha becomes this when you destroy the mecha and pick it up yourself. [[ICallItVera Dan]] is an extreme example.
* BulletHell: Maku and MACE use this.
** In fact, Maku's name, combined with the name of her gun, [[ICallItVera Dan]], form ''danmaku'', which is the Japanese term for the BulletHell genre.
* CrosshairAware: Crosshairs indicate where missiles are going to land during the snowboarding stage, and in the boss fight with MACE they show where his fists will land and where his electric field attack will form.
* CorridorCubbyholeRun: When MACE goes into the background, you need to activate the machine to create platform walls to hide behind from his huge laser. MACE will try to counter this by firing rockets that push the platform back down.
* EnergyWeapons: The blaster is a laser rifle and the machine gun and double rifle may be some sort of plasma gun. Maku wields a large laser cannon, and MACE shoots lasers out of its eyes.
* EyeBeams: The giant robot boss MACE shoots massive lasers out of his eyes.
* FingerFirearms: Mace has these, and he can shoot both fireballs and homing missiles from them, as such...
* {{Fingore}}: eventually have to destroy most of said fingers.
* GeniusProgramming: Smoothly-implemented spritework and a nicely-done physics engine...and it's all by ONE GUY.
* GoombaStomp: Jumping on enemy soldier's heads is a effective way to defeat them and will even earn you a Steam achievement.
* GratuitousJapanese: DanMaku is japanese for [[{{MeaningfulName}} Barrage]].
* GunsAkimbo: Duel pistols can be used but do to the low damage and ammo capacity they are really only useful as backup weapons, especially later in the game.
* HumongousMecha: The final boss MACE is a giant robot, complete with EyeBeams, giant missiles, and huge electrified fists that also shoot lasers.
* ImprobableUseOfAWeapon: Where to begin with Maku, she uses a [[{{BFG}} laser cannon twice as big as her]], twirls it around like a baton , swings around on a grappling hook while shooting it,uses it as some sort of jetpack , fires it at a disco ball to reflect and split the beam, and fires it into the ground to make molten lava shoot out of the ground and [[LethalLavaLand partially fill the cave]].
** You're also allowed to use weaponry of your choice to deflect or destroy certain projectiles, such as missiles.
* MarathonBoss: MACE might take a couple hours, mostly because of it's [[DamageSpongeBoss head that just keeps absorbing damage]].
** BossArenaRecovery: To keep it somehow manageable, every now and then he reaches for a container with some goodies, and some [[FlunkyBoss baddies]].
* MiniMecha: Enemies as well as the player can ride in three kinds of mech suits, some with rifles and homing missile launchers, others with machine guns and giant knives, and ones with a harpoon arm allowing them to grab enemies or objects and throw them as weapons.
* MultiStageBattle: Grabber and MACE
* RocketRide[=/=]RidingTheBomb: The final area of the first game takes place on top of a gigantic missile.
* RuleOfCool: Practically everything listed here is a sub-trope of this.
* SavageWolves: Enemy soldiers ride massive wolves and after killing it's rider the player can mount them. They can run faster and jump farther and higher then the player can on foot, and will automatically bite any enemy in range and all weapons except duel pistols can be fired while riding them.
* ScarfOfAsskicking: The main character has a flowing red scarf, and since he shoots laser guns at flying octopus robots while riding a giant wolf, his status as an asskicker is pretty obvious.
* ShoutOut: The Steam achievement for killing enemies with a GoombaStomp is called "Plumbing" and the icon is a [[Franchise/SuperMarioBros Mushroom.]]
** There's a level titled Bionic Gear, which introduces a MiniMecha armed with a massive grappling hook, likely a ''VideoGame/BionicCommando'' ShoutOut.
** MACE's aforementioned BackgroundBoss attacks (a sweeping laser and a series of missiles fired in an arc) are very similar to those used by General Tor in ''VideoGame/{{Iji}}''. Even the pose he uses while firing them matches.
* SmallGirlBigGun: The boss Maku is a average size but very thin woman who wields a positively '''massive''' laser cannon. It is also apparently called [[ICallItVera Dan]].
* TennisBoss: Maku will surround her self in a blob of energy and fire large grenades at you, the only way to damage her in this form is to shoot the grenades back at her. The missiles fired by Rifle mechs can also be deflected in this manner. When MACE goes into the background, the yellow-tipped rockets he fires out can be shot enough times so they fly back at him.
* VehicularAssault: The Grabber. After it [[LoadBearingBoss explodes]], you get to surf it's debris down a mountain and finish it's parachuting pilots off.
* YouWillNotEvadeMe: MACE has full control of your movement. First he grabs the corridor leading to a building; then he lets you go inside and uproots it with everything inside, including you.