Microsoft just announced this week’s additions to the XBLA roster: Hexic 2 and Sega Genesis oldie Ecco the Dolphin.

Hexic 2 is a challenging puzzle hit from Alexey Pajitnov, the creator of Tetris. Players rotate colored hexagons to create groups of pieces touching three or more identical pieces. Additionally, up to 2 players can compete over Xbox Live or on the same console via split screen. Grab it for 800 Microsoft Points.

Ecco the Dolphin is a new addition to the SEGA Vintage Collection on Xbox 360. Originally released on the Genesis, this XBLA version features enhanced graphics and sound, as well as an online leaderboard that tracks your best times. This classic will set you back 400 Microsoft Points.

Read more: Ecco heading to XBLA, XBLA Wednesday: Space Giraffe and Street Trace, XBLA Wednesday: Track and Field, SEGA Vintage Collection 2 Hitting XBLA, PSN, Gunstar Heroes XBLA Shots Leak Out