The "Indie Royale" bundle has 4 games which you can activate on Steam - ARES, Nimbus, Gemini Rue and Sanctum, plus 2 bits of DLC for Sanctum and possible "further surprises" at some point before it ends (about a day and 16 hours from now).
It works sort of like the Humble Indie bundles, but for this one you have to beat the minimum price, which is currently £2.57.
Still a great deal for what you get - Nimbus is really addictive, it's one of those "just one more go" time trial games and has friend leaderboards. The other 3 games are meant to be highly rated as well.
LinkThey also promise to be doing at least 3 similar bundles with different games, one every two weeks or so. Could be a great way to build your games list cheaply if the other bundles have games as good as this one.