Riding on the success of the first 2 installments, Metal Slug X is, contrary to what its title might suggest, the 3rd episode of the series, released in 1999 and still published by SNK for its Neo-Geo Systems (arcade and consoles).
In addition to an overhaul of the visual elements, the game brings new weapons, more powerful than the previous parts, and 2 new vehicles (the Slug Noid and the Metal Slug Type-R).
This online version is again a perfect adaptation of the original game.
Game Controls:
Shift: Insert Coin
Enter: Start
Arrows: Move
X: Button A
C: Button B
Z: Button C
S: Button D
See also:
Metal Slug 1
Metal Slug 2