Space Invaders for the WonderSwan is a port or adaptation of the classic arcade game. This release would offer the familiar gameplay of shooting down descending alien waves using a laser cannon. Given the platform, the controls and interface are likely adjusted for the WonderSwan.   The development team, and the exact date of release for this WonderSwan adaptation remain obscure. The 'J' indicates it's a Japanese release, while '[M]' potentially represents a rating and '[!]' suggests a limited release or otherwise unusual distribution. 

Space Invaders (J) [M][!]

Soccer Yarou! - Challenge the World (J) [M]