Solution : The Gremlins - The Adventure

D, TAKE SWORD, KILL GREMLIN, TAKE REMOTE, GO TO KITCHEN, PUSH REMOTE, PRESS BUTTON, PRESS BUTTON, PUSH REMOTE*2, EXAMINE CHUTE, PRESS BUTTON*2, EXAMINE DRAWER, TAKE KNIFE, E, U, KILL GREMLIN, TAKE FLASHLIGHT, D, GO DOOR, N, E, E, N.

(1) ===== THE HOUSE ================
D, get sword, kill gremlin, get remote, drop sword, go kitchen, push button[x5] -you kill two gremlins and open the laundry chute-, look chute -you find Gizmo, you'll need it for completing the game-, push button[x2] -you close the chute and open the drawer-, drop remote, get knife, get spark, E, U, kill gremlin, get flashlight, light flashlight -important!-, D, go door

(2) ===== THE SNOW PLOUGH ==========
N, E, go petrol, go pit, get all -you get welding torch and gas bottle-, open valve, light torch, U, N, W, N, mail flashlight -Stripe was in the mail box-, cut mail, drop spark, get metal, S[x3], weld snow

(3) ===== THE YMCA AND THE TAVERN ==
get ladder, N[x2], W, go ymca, drop all, go pool, get plug -you empty the pool-, U, get all, drop gizmo, E[x4] -gang of gremlins appear-, go tavern, go bar, get camera, push button, cut pipe, drop knife, get pipe, N[x2], E

(4) ===== THE CINEMA [OPTIONAL] ==
go cinema, S, start projector, N[x2]

(5) ===== THE STORE ==============
-- you can get rid of gremlins using "PUSH BUTTON", there are 9 smashed vents --
(5.a) GROUND FLOOR [3 vents (of 4)]
go store, N, [Gizmo enters ventilation system] weld metal, W, weld metal, E, S, E[x2], weld metal, W -return to stairs-
(5.b) 1ST FLOOR [1 vent]
U, E, weld metal, W -return to stairs-
(5.c) 2ND FLOOR [2 vents]
U, W, open door, go door, weld metal, E[x3], open door, go door, weld metal, N, W -return to stairs-
(5.d) 3RD FLOOR [1 vent]
W -Gizmo opens door-,go door, weld metal, E[x2], -return to stairs-
(5.e) CEILING [1 vent]
drop ladder, go ceil, weld metal
(5.f) LAST VENT
D[x4], W[x2], push button -gremlins enter last hole-, weld metal, look counter, get tape,
plug drill, pick drill, drill metal, drop drill, close valve, drop torch, drop bottle, drop metal, get hacksaw, cut pipe, join pipe

(6) ===== END OF THE GAME ========
drop all, open valve, E, S -you're out of the store-, W[x4] -you reach the YMCA-, WAIT (repeat this command till store explodes), go ymca -Stripe jumps into pool but it's empty-, go pool, pick Stripe, U, E -sun's rays destroy Stripe. The end-